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8011 lines
235 KiB
JavaScript
8011 lines
235 KiB
JavaScript
/**
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* @license
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* Lodash (Custom Build) <https://lodash.com/>
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* Build: `lodash include="each,filter,map,range,first,isEmpty,chain,extend,every,omit,merge,union,sortBy,uniq,intersection,reject,compact,reduce,debounce,throttle,values,pick,keys,flatten,min,max,isArray,delay,isString,isEqual,without,invoke,clone,findIndex,find,groupBy" minus="template" -d`
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* Copyright JS Foundation and other contributors <https://js.foundation/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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;(function() {
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/** Used as a safe reference for `undefined` in pre-ES5 environments. */
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var undefined;
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/** Used as the semantic version number. */
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var VERSION = '4.17.11';
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/** Used as the size to enable large array optimizations. */
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var LARGE_ARRAY_SIZE = 200;
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/** Error message constants. */
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var FUNC_ERROR_TEXT = 'Expected a function';
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/** Used to stand-in for `undefined` hash values. */
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var HASH_UNDEFINED = '__lodash_hash_undefined__';
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/** Used as the maximum memoize cache size. */
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var MAX_MEMOIZE_SIZE = 500;
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/** Used as the internal argument placeholder. */
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var PLACEHOLDER = '__lodash_placeholder__';
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/** Used to compose bitmasks for cloning. */
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var CLONE_DEEP_FLAG = 1,
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CLONE_FLAT_FLAG = 2,
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CLONE_SYMBOLS_FLAG = 4;
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/** Used to compose bitmasks for value comparisons. */
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var COMPARE_PARTIAL_FLAG = 1,
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COMPARE_UNORDERED_FLAG = 2;
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/** Used to compose bitmasks for function metadata. */
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var WRAP_BIND_FLAG = 1,
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WRAP_BIND_KEY_FLAG = 2,
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WRAP_CURRY_BOUND_FLAG = 4,
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WRAP_CURRY_FLAG = 8,
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WRAP_CURRY_RIGHT_FLAG = 16,
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WRAP_PARTIAL_FLAG = 32,
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WRAP_PARTIAL_RIGHT_FLAG = 64,
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WRAP_ARY_FLAG = 128,
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WRAP_REARG_FLAG = 256,
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WRAP_FLIP_FLAG = 512;
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/** Used to detect hot functions by number of calls within a span of milliseconds. */
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var HOT_COUNT = 800,
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HOT_SPAN = 16;
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/** Used to indicate the type of lazy iteratees. */
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var LAZY_FILTER_FLAG = 1,
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LAZY_MAP_FLAG = 2,
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LAZY_WHILE_FLAG = 3;
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/** Used as references for various `Number` constants. */
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var INFINITY = 1 / 0,
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MAX_SAFE_INTEGER = 9007199254740991,
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MAX_INTEGER = 1.7976931348623157e+308,
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NAN = 0 / 0;
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/** Used as references for the maximum length and index of an array. */
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var MAX_ARRAY_LENGTH = 4294967295;
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/** Used to associate wrap methods with their bit flags. */
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var wrapFlags = [
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['ary', WRAP_ARY_FLAG],
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['bind', WRAP_BIND_FLAG],
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['bindKey', WRAP_BIND_KEY_FLAG],
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['curry', WRAP_CURRY_FLAG],
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['curryRight', WRAP_CURRY_RIGHT_FLAG],
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['flip', WRAP_FLIP_FLAG],
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['partial', WRAP_PARTIAL_FLAG],
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['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
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['rearg', WRAP_REARG_FLAG]
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];
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/** `Object#toString` result references. */
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var argsTag = '[object Arguments]',
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arrayTag = '[object Array]',
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asyncTag = '[object AsyncFunction]',
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boolTag = '[object Boolean]',
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dateTag = '[object Date]',
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errorTag = '[object Error]',
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funcTag = '[object Function]',
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genTag = '[object GeneratorFunction]',
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mapTag = '[object Map]',
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numberTag = '[object Number]',
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nullTag = '[object Null]',
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objectTag = '[object Object]',
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promiseTag = '[object Promise]',
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proxyTag = '[object Proxy]',
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regexpTag = '[object RegExp]',
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setTag = '[object Set]',
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stringTag = '[object String]',
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symbolTag = '[object Symbol]',
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undefinedTag = '[object Undefined]',
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weakMapTag = '[object WeakMap]';
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var arrayBufferTag = '[object ArrayBuffer]',
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dataViewTag = '[object DataView]',
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float32Tag = '[object Float32Array]',
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float64Tag = '[object Float64Array]',
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int8Tag = '[object Int8Array]',
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int16Tag = '[object Int16Array]',
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int32Tag = '[object Int32Array]',
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uint8Tag = '[object Uint8Array]',
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uint8ClampedTag = '[object Uint8ClampedArray]',
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uint16Tag = '[object Uint16Array]',
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uint32Tag = '[object Uint32Array]';
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/** Used to match property names within property paths. */
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var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
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reIsPlainProp = /^\w*$/,
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rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
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/**
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* Used to match `RegExp`
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* [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
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*/
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var reRegExpChar = /[\\^$.*+?()[\]{}|]/g;
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/** Used to match leading and trailing whitespace. */
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var reTrim = /^\s+|\s+$/g;
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/** Used to match wrap detail comments. */
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var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
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reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
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reSplitDetails = /,? & /;
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/** Used to match backslashes in property paths. */
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var reEscapeChar = /\\(\\)?/g;
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/** Used to match `RegExp` flags from their coerced string values. */
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var reFlags = /\w*$/;
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/** Used to detect bad signed hexadecimal string values. */
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var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
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/** Used to detect binary string values. */
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var reIsBinary = /^0b[01]+$/i;
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/** Used to detect host constructors (Safari). */
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var reIsHostCtor = /^\[object .+?Constructor\]$/;
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/** Used to detect octal string values. */
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var reIsOctal = /^0o[0-7]+$/i;
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/** Used to detect unsigned integer values. */
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var reIsUint = /^(?:0|[1-9]\d*)$/;
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/** Used to compose unicode character classes. */
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var rsAstralRange = '\\ud800-\\udfff',
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rsComboMarksRange = '\\u0300-\\u036f',
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reComboHalfMarksRange = '\\ufe20-\\ufe2f',
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rsComboSymbolsRange = '\\u20d0-\\u20ff',
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rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
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rsVarRange = '\\ufe0e\\ufe0f';
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/** Used to compose unicode capture groups. */
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var rsAstral = '[' + rsAstralRange + ']',
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rsCombo = '[' + rsComboRange + ']',
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rsFitz = '\\ud83c[\\udffb-\\udfff]',
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rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
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rsNonAstral = '[^' + rsAstralRange + ']',
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rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
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rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
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rsZWJ = '\\u200d';
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/** Used to compose unicode regexes. */
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var reOptMod = rsModifier + '?',
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rsOptVar = '[' + rsVarRange + ']?',
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rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
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rsSeq = rsOptVar + reOptMod + rsOptJoin,
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rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
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/** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
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var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
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/** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
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var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
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/** Used to identify `toStringTag` values of typed arrays. */
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var typedArrayTags = {};
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typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
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typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
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typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
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typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
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typedArrayTags[uint32Tag] = true;
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typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
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typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
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typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
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typedArrayTags[errorTag] = typedArrayTags[funcTag] =
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typedArrayTags[mapTag] = typedArrayTags[numberTag] =
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typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
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typedArrayTags[setTag] = typedArrayTags[stringTag] =
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typedArrayTags[weakMapTag] = false;
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/** Used to identify `toStringTag` values supported by `_.clone`. */
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var cloneableTags = {};
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cloneableTags[argsTag] = cloneableTags[arrayTag] =
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cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
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cloneableTags[boolTag] = cloneableTags[dateTag] =
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cloneableTags[float32Tag] = cloneableTags[float64Tag] =
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cloneableTags[int8Tag] = cloneableTags[int16Tag] =
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cloneableTags[int32Tag] = cloneableTags[mapTag] =
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cloneableTags[numberTag] = cloneableTags[objectTag] =
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cloneableTags[regexpTag] = cloneableTags[setTag] =
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cloneableTags[stringTag] = cloneableTags[symbolTag] =
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cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
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cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
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cloneableTags[errorTag] = cloneableTags[funcTag] =
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cloneableTags[weakMapTag] = false;
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/** Built-in method references without a dependency on `root`. */
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var freeParseInt = parseInt;
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/** Detect free variable `global` from Node.js. */
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var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
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/** Detect free variable `self`. */
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var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
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/** Used as a reference to the global object. */
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var root = freeGlobal || freeSelf || Function('return this')();
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/** Detect free variable `exports`. */
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var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
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/** Detect free variable `module`. */
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var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
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/** Detect the popular CommonJS extension `module.exports`. */
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var moduleExports = freeModule && freeModule.exports === freeExports;
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/** Detect free variable `process` from Node.js. */
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var freeProcess = moduleExports && freeGlobal.process;
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/** Used to access faster Node.js helpers. */
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var nodeUtil = (function() {
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try {
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// Use `util.types` for Node.js 10+.
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var types = freeModule && freeModule.require && freeModule.require('util').types;
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if (types) {
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return types;
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}
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// Legacy `process.binding('util')` for Node.js < 10.
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return freeProcess && freeProcess.binding && freeProcess.binding('util');
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} catch (e) {}
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}());
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/* Node.js helper references. */
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var nodeIsMap = nodeUtil && nodeUtil.isMap,
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nodeIsSet = nodeUtil && nodeUtil.isSet,
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nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
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/*--------------------------------------------------------------------------*/
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/**
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* A faster alternative to `Function#apply`, this function invokes `func`
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* with the `this` binding of `thisArg` and the arguments of `args`.
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*
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* @private
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* @param {Function} func The function to invoke.
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* @param {*} thisArg The `this` binding of `func`.
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* @param {Array} args The arguments to invoke `func` with.
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* @returns {*} Returns the result of `func`.
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*/
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function apply(func, thisArg, args) {
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switch (args.length) {
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case 0: return func.call(thisArg);
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case 1: return func.call(thisArg, args[0]);
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case 2: return func.call(thisArg, args[0], args[1]);
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case 3: return func.call(thisArg, args[0], args[1], args[2]);
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}
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return func.apply(thisArg, args);
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}
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/**
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* A specialized version of `baseAggregator` for arrays.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} setter The function to set `accumulator` values.
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* @param {Function} iteratee The iteratee to transform keys.
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* @param {Object} accumulator The initial aggregated object.
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* @returns {Function} Returns `accumulator`.
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*/
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function arrayAggregator(array, setter, iteratee, accumulator) {
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var index = -1,
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length = array == null ? 0 : array.length;
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while (++index < length) {
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var value = array[index];
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setter(accumulator, value, iteratee(value), array);
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}
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return accumulator;
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}
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/**
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* A specialized version of `_.forEach` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns `array`.
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*/
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function arrayEach(array, iteratee) {
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var index = -1,
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length = array == null ? 0 : array.length;
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while (++index < length) {
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if (iteratee(array[index], index, array) === false) {
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break;
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}
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}
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return array;
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}
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/**
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* A specialized version of `_.every` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} predicate The function invoked per iteration.
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* @returns {boolean} Returns `true` if all elements pass the predicate check,
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* else `false`.
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*/
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function arrayEvery(array, predicate) {
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var index = -1,
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length = array == null ? 0 : array.length;
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while (++index < length) {
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if (!predicate(array[index], index, array)) {
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return false;
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}
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}
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return true;
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}
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/**
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* A specialized version of `_.filter` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} predicate The function invoked per iteration.
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* @returns {Array} Returns the new filtered array.
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*/
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function arrayFilter(array, predicate) {
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var index = -1,
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length = array == null ? 0 : array.length,
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resIndex = 0,
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result = [];
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while (++index < length) {
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var value = array[index];
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if (predicate(value, index, array)) {
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result[resIndex++] = value;
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}
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}
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return result;
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}
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/**
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* A specialized version of `_.includes` for arrays without support for
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* specifying an index to search from.
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*
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* @private
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* @param {Array} [array] The array to inspect.
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* @param {*} target The value to search for.
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* @returns {boolean} Returns `true` if `target` is found, else `false`.
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*/
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function arrayIncludes(array, value) {
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var length = array == null ? 0 : array.length;
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return !!length && baseIndexOf(array, value, 0) > -1;
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}
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/**
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* This function is like `arrayIncludes` except that it accepts a comparator.
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*
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* @private
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* @param {Array} [array] The array to inspect.
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* @param {*} target The value to search for.
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* @param {Function} comparator The comparator invoked per element.
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* @returns {boolean} Returns `true` if `target` is found, else `false`.
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*/
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function arrayIncludesWith(array, value, comparator) {
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var index = -1,
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length = array == null ? 0 : array.length;
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while (++index < length) {
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if (comparator(value, array[index])) {
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return true;
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}
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}
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return false;
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}
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/**
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* A specialized version of `_.map` for arrays without support for iteratee
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* shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns the new mapped array.
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*/
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function arrayMap(array, iteratee) {
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var index = -1,
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length = array == null ? 0 : array.length,
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result = Array(length);
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while (++index < length) {
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result[index] = iteratee(array[index], index, array);
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}
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return result;
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}
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/**
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* Appends the elements of `values` to `array`.
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*
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* @private
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* @param {Array} array The array to modify.
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* @param {Array} values The values to append.
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* @returns {Array} Returns `array`.
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*/
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function arrayPush(array, values) {
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var index = -1,
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length = values.length,
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offset = array.length;
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while (++index < length) {
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array[offset + index] = values[index];
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}
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return array;
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}
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/**
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* A specialized version of `_.reduce` for arrays without support for
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* iteratee shorthands.
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*
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* @private
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* @param {Array} [array] The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {*} [accumulator] The initial value.
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* @param {boolean} [initAccum] Specify using the first element of `array` as
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* the initial value.
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* @returns {*} Returns the accumulated value.
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*/
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function arrayReduce(array, iteratee, accumulator, initAccum) {
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var index = -1,
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length = array == null ? 0 : array.length;
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if (initAccum && length) {
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accumulator = array[++index];
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}
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|
while (++index < length) {
|
|
accumulator = iteratee(accumulator, array[index], index, array);
|
|
}
|
|
return accumulator;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `_.some` for arrays without support for iteratee
|
|
* shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array} [array] The array to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {boolean} Returns `true` if any element passes the predicate check,
|
|
* else `false`.
|
|
*/
|
|
function arraySome(array, predicate) {
|
|
var index = -1,
|
|
length = array == null ? 0 : array.length;
|
|
|
|
while (++index < length) {
|
|
if (predicate(array[index], index, array)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Converts an ASCII `string` to an array.
|
|
*
|
|
* @private
|
|
* @param {string} string The string to convert.
|
|
* @returns {Array} Returns the converted array.
|
|
*/
|
|
function asciiToArray(string) {
|
|
return string.split('');
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.findIndex` and `_.findLastIndex` without
|
|
* support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @param {number} fromIndex The index to search from.
|
|
* @param {boolean} [fromRight] Specify iterating from right to left.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
*/
|
|
function baseFindIndex(array, predicate, fromIndex, fromRight) {
|
|
var length = array.length,
|
|
index = fromIndex + (fromRight ? 1 : -1);
|
|
|
|
while ((fromRight ? index-- : ++index < length)) {
|
|
if (predicate(array[index], index, array)) {
|
|
return index;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.indexOf` without `fromIndex` bounds checks.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} value The value to search for.
|
|
* @param {number} fromIndex The index to search from.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
*/
|
|
function baseIndexOf(array, value, fromIndex) {
|
|
return value === value
|
|
? strictIndexOf(array, value, fromIndex)
|
|
: baseFindIndex(array, baseIsNaN, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isNaN` without support for number objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
|
|
*/
|
|
function baseIsNaN(value) {
|
|
return value !== value;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.property` without support for deep paths.
|
|
*
|
|
* @private
|
|
* @param {string} key The key of the property to get.
|
|
* @returns {Function} Returns the new accessor function.
|
|
*/
|
|
function baseProperty(key) {
|
|
return function(object) {
|
|
return object == null ? undefined : object[key];
|
|
};
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.reduce` and `_.reduceRight`, without support
|
|
* for iteratee shorthands, which iterates over `collection` using `eachFunc`.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {*} accumulator The initial value.
|
|
* @param {boolean} initAccum Specify using the first or last element of
|
|
* `collection` as the initial value.
|
|
* @param {Function} eachFunc The function to iterate over `collection`.
|
|
* @returns {*} Returns the accumulated value.
|
|
*/
|
|
function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
|
|
eachFunc(collection, function(value, index, collection) {
|
|
accumulator = initAccum
|
|
? (initAccum = false, value)
|
|
: iteratee(accumulator, value, index, collection);
|
|
});
|
|
return accumulator;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.sortBy` which uses `comparer` to define the
|
|
* sort order of `array` and replaces criteria objects with their corresponding
|
|
* values.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to sort.
|
|
* @param {Function} comparer The function to define sort order.
|
|
* @returns {Array} Returns `array`.
|
|
*/
|
|
function baseSortBy(array, comparer) {
|
|
var length = array.length;
|
|
|
|
array.sort(comparer);
|
|
while (length--) {
|
|
array[length] = array[length].value;
|
|
}
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.times` without support for iteratee shorthands
|
|
* or max array length checks.
|
|
*
|
|
* @private
|
|
* @param {number} n The number of times to invoke `iteratee`.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array} Returns the array of results.
|
|
*/
|
|
function baseTimes(n, iteratee) {
|
|
var index = -1,
|
|
result = Array(n);
|
|
|
|
while (++index < n) {
|
|
result[index] = iteratee(index);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.unary` without support for storing metadata.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to cap arguments for.
|
|
* @returns {Function} Returns the new capped function.
|
|
*/
|
|
function baseUnary(func) {
|
|
return function(value) {
|
|
return func(value);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.values` and `_.valuesIn` which creates an
|
|
* array of `object` property values corresponding to the property names
|
|
* of `props`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Array} props The property names to get values for.
|
|
* @returns {Object} Returns the array of property values.
|
|
*/
|
|
function baseValues(object, props) {
|
|
return arrayMap(props, function(key) {
|
|
return object[key];
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Checks if a `cache` value for `key` exists.
|
|
*
|
|
* @private
|
|
* @param {Object} cache The cache to query.
|
|
* @param {string} key The key of the entry to check.
|
|
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
|
|
*/
|
|
function cacheHas(cache, key) {
|
|
return cache.has(key);
|
|
}
|
|
|
|
/**
|
|
* Gets the number of `placeholder` occurrences in `array`.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} placeholder The placeholder to search for.
|
|
* @returns {number} Returns the placeholder count.
|
|
*/
|
|
function countHolders(array, placeholder) {
|
|
var length = array.length,
|
|
result = 0;
|
|
|
|
while (length--) {
|
|
if (array[length] === placeholder) {
|
|
++result;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the value at `key` of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} [object] The object to query.
|
|
* @param {string} key The key of the property to get.
|
|
* @returns {*} Returns the property value.
|
|
*/
|
|
function getValue(object, key) {
|
|
return object == null ? undefined : object[key];
|
|
}
|
|
|
|
/**
|
|
* Checks if `string` contains Unicode symbols.
|
|
*
|
|
* @private
|
|
* @param {string} string The string to inspect.
|
|
* @returns {boolean} Returns `true` if a symbol is found, else `false`.
|
|
*/
|
|
function hasUnicode(string) {
|
|
return reHasUnicode.test(string);
|
|
}
|
|
|
|
/**
|
|
* Converts `iterator` to an array.
|
|
*
|
|
* @private
|
|
* @param {Object} iterator The iterator to convert.
|
|
* @returns {Array} Returns the converted array.
|
|
*/
|
|
function iteratorToArray(iterator) {
|
|
var data,
|
|
result = [];
|
|
|
|
while (!(data = iterator.next()).done) {
|
|
result.push(data.value);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts `map` to its key-value pairs.
|
|
*
|
|
* @private
|
|
* @param {Object} map The map to convert.
|
|
* @returns {Array} Returns the key-value pairs.
|
|
*/
|
|
function mapToArray(map) {
|
|
var index = -1,
|
|
result = Array(map.size);
|
|
|
|
map.forEach(function(value, key) {
|
|
result[++index] = [key, value];
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a unary function that invokes `func` with its argument transformed.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to wrap.
|
|
* @param {Function} transform The argument transform.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function overArg(func, transform) {
|
|
return function(arg) {
|
|
return func(transform(arg));
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Replaces all `placeholder` elements in `array` with an internal placeholder
|
|
* and returns an array of their indexes.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to modify.
|
|
* @param {*} placeholder The placeholder to replace.
|
|
* @returns {Array} Returns the new array of placeholder indexes.
|
|
*/
|
|
function replaceHolders(array, placeholder) {
|
|
var index = -1,
|
|
length = array.length,
|
|
resIndex = 0,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
if (value === placeholder || value === PLACEHOLDER) {
|
|
array[index] = PLACEHOLDER;
|
|
result[resIndex++] = index;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts `set` to an array of its values.
|
|
*
|
|
* @private
|
|
* @param {Object} set The set to convert.
|
|
* @returns {Array} Returns the values.
|
|
*/
|
|
function setToArray(set) {
|
|
var index = -1,
|
|
result = Array(set.size);
|
|
|
|
set.forEach(function(value) {
|
|
result[++index] = value;
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `_.indexOf` which performs strict equality
|
|
* comparisons of values, i.e. `===`.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} value The value to search for.
|
|
* @param {number} fromIndex The index to search from.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
*/
|
|
function strictIndexOf(array, value, fromIndex) {
|
|
var index = fromIndex - 1,
|
|
length = array.length;
|
|
|
|
while (++index < length) {
|
|
if (array[index] === value) {
|
|
return index;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Converts `string` to an array.
|
|
*
|
|
* @private
|
|
* @param {string} string The string to convert.
|
|
* @returns {Array} Returns the converted array.
|
|
*/
|
|
function stringToArray(string) {
|
|
return hasUnicode(string)
|
|
? unicodeToArray(string)
|
|
: asciiToArray(string);
|
|
}
|
|
|
|
/**
|
|
* Converts a Unicode `string` to an array.
|
|
*
|
|
* @private
|
|
* @param {string} string The string to convert.
|
|
* @returns {Array} Returns the converted array.
|
|
*/
|
|
function unicodeToArray(string) {
|
|
return string.match(reUnicode) || [];
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/** Used for built-in method references. */
|
|
var arrayProto = Array.prototype,
|
|
funcProto = Function.prototype,
|
|
objectProto = Object.prototype;
|
|
|
|
/** Used to detect overreaching core-js shims. */
|
|
var coreJsData = root['__core-js_shared__'];
|
|
|
|
/** Used to resolve the decompiled source of functions. */
|
|
var funcToString = funcProto.toString;
|
|
|
|
/** Used to check objects for own properties. */
|
|
var hasOwnProperty = objectProto.hasOwnProperty;
|
|
|
|
/** Used to detect methods masquerading as native. */
|
|
var maskSrcKey = (function() {
|
|
var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
|
|
return uid ? ('Symbol(src)_1.' + uid) : '';
|
|
}());
|
|
|
|
/**
|
|
* Used to resolve the
|
|
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
|
|
* of values.
|
|
*/
|
|
var nativeObjectToString = objectProto.toString;
|
|
|
|
/** Used to infer the `Object` constructor. */
|
|
var objectCtorString = funcToString.call(Object);
|
|
|
|
/** Used to detect if a method is native. */
|
|
var reIsNative = RegExp('^' +
|
|
funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
|
|
.replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
|
|
);
|
|
|
|
/** Built-in value references. */
|
|
var Buffer = moduleExports ? root.Buffer : undefined,
|
|
Symbol = root.Symbol,
|
|
Uint8Array = root.Uint8Array,
|
|
allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
|
|
getPrototype = overArg(Object.getPrototypeOf, Object),
|
|
objectCreate = Object.create,
|
|
propertyIsEnumerable = objectProto.propertyIsEnumerable,
|
|
splice = arrayProto.splice,
|
|
spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
|
|
symIterator = Symbol ? Symbol.iterator : undefined,
|
|
symToStringTag = Symbol ? Symbol.toStringTag : undefined;
|
|
|
|
var defineProperty = (function() {
|
|
try {
|
|
var func = getNative(Object, 'defineProperty');
|
|
func({}, '', {});
|
|
return func;
|
|
} catch (e) {}
|
|
}());
|
|
|
|
/* Built-in method references for those with the same name as other `lodash` methods. */
|
|
var nativeCeil = Math.ceil,
|
|
nativeGetSymbols = Object.getOwnPropertySymbols,
|
|
nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
|
|
nativeKeys = overArg(Object.keys, Object),
|
|
nativeMax = Math.max,
|
|
nativeMin = Math.min,
|
|
nativeNow = Date.now,
|
|
nativeReverse = arrayProto.reverse;
|
|
|
|
/* Built-in method references that are verified to be native. */
|
|
var DataView = getNative(root, 'DataView'),
|
|
Map = getNative(root, 'Map'),
|
|
Promise = getNative(root, 'Promise'),
|
|
Set = getNative(root, 'Set'),
|
|
WeakMap = getNative(root, 'WeakMap'),
|
|
nativeCreate = getNative(Object, 'create');
|
|
|
|
/** Used to store function metadata. */
|
|
var metaMap = WeakMap && new WeakMap;
|
|
|
|
/** Used to lookup unminified function names. */
|
|
var realNames = {};
|
|
|
|
/** Used to detect maps, sets, and weakmaps. */
|
|
var dataViewCtorString = toSource(DataView),
|
|
mapCtorString = toSource(Map),
|
|
promiseCtorString = toSource(Promise),
|
|
setCtorString = toSource(Set),
|
|
weakMapCtorString = toSource(WeakMap);
|
|
|
|
/** Used to convert symbols to primitives and strings. */
|
|
var symbolProto = Symbol ? Symbol.prototype : undefined,
|
|
symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
|
|
symbolToString = symbolProto ? symbolProto.toString : undefined;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a `lodash` object which wraps `value` to enable implicit method
|
|
* chain sequences. Methods that operate on and return arrays, collections,
|
|
* and functions can be chained together. Methods that retrieve a single value
|
|
* or may return a primitive value will automatically end the chain sequence
|
|
* and return the unwrapped value. Otherwise, the value must be unwrapped
|
|
* with `_#value`.
|
|
*
|
|
* Explicit chain sequences, which must be unwrapped with `_#value`, may be
|
|
* enabled using `_.chain`.
|
|
*
|
|
* The execution of chained methods is lazy, that is, it's deferred until
|
|
* `_#value` is implicitly or explicitly called.
|
|
*
|
|
* Lazy evaluation allows several methods to support shortcut fusion.
|
|
* Shortcut fusion is an optimization to merge iteratee calls; this avoids
|
|
* the creation of intermediate arrays and can greatly reduce the number of
|
|
* iteratee executions. Sections of a chain sequence qualify for shortcut
|
|
* fusion if the section is applied to an array and iteratees accept only
|
|
* one argument. The heuristic for whether a section qualifies for shortcut
|
|
* fusion is subject to change.
|
|
*
|
|
* Chaining is supported in custom builds as long as the `_#value` method is
|
|
* directly or indirectly included in the build.
|
|
*
|
|
* In addition to lodash methods, wrappers have `Array` and `String` methods.
|
|
*
|
|
* The wrapper `Array` methods are:
|
|
* `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
|
|
*
|
|
* The wrapper `String` methods are:
|
|
* `replace` and `split`
|
|
*
|
|
* The wrapper methods that support shortcut fusion are:
|
|
* `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
|
|
* `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
|
|
* `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
|
|
*
|
|
* The chainable wrapper methods are:
|
|
* `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
|
|
* `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
|
|
* `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
|
|
* `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
|
|
* `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
|
|
* `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
|
|
* `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
|
|
* `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
|
|
* `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
|
|
* `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
|
|
* `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
|
|
* `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
|
|
* `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
|
|
* `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
|
|
* `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
|
|
* `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
|
|
* `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
|
|
* `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
|
|
* `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
|
|
* `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
|
|
* `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
|
|
* `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
|
|
* `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
|
|
* `zipObject`, `zipObjectDeep`, and `zipWith`
|
|
*
|
|
* The wrapper methods that are **not** chainable by default are:
|
|
* `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
|
|
* `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
|
|
* `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
|
|
* `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
|
|
* `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
|
|
* `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
|
|
* `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
|
|
* `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
|
|
* `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
|
|
* `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
|
|
* `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
|
|
* `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
|
|
* `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
|
|
* `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
|
|
* `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
|
|
* `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
|
|
* `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
|
|
* `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
|
|
* `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
|
|
* `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
|
|
* `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
|
|
* `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
|
|
* `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
|
|
* `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
|
|
* `upperFirst`, `value`, and `words`
|
|
*
|
|
* @name _
|
|
* @constructor
|
|
* @category Seq
|
|
* @param {*} value The value to wrap in a `lodash` instance.
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* function square(n) {
|
|
* return n * n;
|
|
* }
|
|
*
|
|
* var wrapped = _([1, 2, 3]);
|
|
*
|
|
* // Returns an unwrapped value.
|
|
* wrapped.reduce(_.add);
|
|
* // => 6
|
|
*
|
|
* // Returns a wrapped value.
|
|
* var squares = wrapped.map(square);
|
|
*
|
|
* _.isArray(squares);
|
|
* // => false
|
|
*
|
|
* _.isArray(squares.value());
|
|
* // => true
|
|
*/
|
|
function lodash(value) {
|
|
if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
|
|
if (value instanceof LodashWrapper) {
|
|
return value;
|
|
}
|
|
if (hasOwnProperty.call(value, '__wrapped__')) {
|
|
return wrapperClone(value);
|
|
}
|
|
}
|
|
return new LodashWrapper(value);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.create` without support for assigning
|
|
* properties to the created object.
|
|
*
|
|
* @private
|
|
* @param {Object} proto The object to inherit from.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
var baseCreate = (function() {
|
|
function object() {}
|
|
return function(proto) {
|
|
if (!isObject(proto)) {
|
|
return {};
|
|
}
|
|
if (objectCreate) {
|
|
return objectCreate(proto);
|
|
}
|
|
object.prototype = proto;
|
|
var result = new object;
|
|
object.prototype = undefined;
|
|
return result;
|
|
};
|
|
}());
|
|
|
|
/**
|
|
* The function whose prototype chain sequence wrappers inherit from.
|
|
*
|
|
* @private
|
|
*/
|
|
function baseLodash() {
|
|
// No operation performed.
|
|
}
|
|
|
|
/**
|
|
* The base constructor for creating `lodash` wrapper objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to wrap.
|
|
* @param {boolean} [chainAll] Enable explicit method chain sequences.
|
|
*/
|
|
function LodashWrapper(value, chainAll) {
|
|
this.__wrapped__ = value;
|
|
this.__actions__ = [];
|
|
this.__chain__ = !!chainAll;
|
|
this.__index__ = 0;
|
|
this.__values__ = undefined;
|
|
}
|
|
|
|
// Ensure wrappers are instances of `baseLodash`.
|
|
lodash.prototype = baseLodash.prototype;
|
|
lodash.prototype.constructor = lodash;
|
|
|
|
LodashWrapper.prototype = baseCreate(baseLodash.prototype);
|
|
LodashWrapper.prototype.constructor = LodashWrapper;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {*} value The value to wrap.
|
|
*/
|
|
function LazyWrapper(value) {
|
|
this.__wrapped__ = value;
|
|
this.__actions__ = [];
|
|
this.__dir__ = 1;
|
|
this.__filtered__ = false;
|
|
this.__iteratees__ = [];
|
|
this.__takeCount__ = MAX_ARRAY_LENGTH;
|
|
this.__views__ = [];
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of the lazy wrapper object.
|
|
*
|
|
* @private
|
|
* @name clone
|
|
* @memberOf LazyWrapper
|
|
* @returns {Object} Returns the cloned `LazyWrapper` object.
|
|
*/
|
|
function lazyClone() {
|
|
var result = new LazyWrapper(this.__wrapped__);
|
|
result.__actions__ = copyArray(this.__actions__);
|
|
result.__dir__ = this.__dir__;
|
|
result.__filtered__ = this.__filtered__;
|
|
result.__iteratees__ = copyArray(this.__iteratees__);
|
|
result.__takeCount__ = this.__takeCount__;
|
|
result.__views__ = copyArray(this.__views__);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Reverses the direction of lazy iteration.
|
|
*
|
|
* @private
|
|
* @name reverse
|
|
* @memberOf LazyWrapper
|
|
* @returns {Object} Returns the new reversed `LazyWrapper` object.
|
|
*/
|
|
function lazyReverse() {
|
|
if (this.__filtered__) {
|
|
var result = new LazyWrapper(this);
|
|
result.__dir__ = -1;
|
|
result.__filtered__ = true;
|
|
} else {
|
|
result = this.clone();
|
|
result.__dir__ *= -1;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Extracts the unwrapped value from its lazy wrapper.
|
|
*
|
|
* @private
|
|
* @name value
|
|
* @memberOf LazyWrapper
|
|
* @returns {*} Returns the unwrapped value.
|
|
*/
|
|
function lazyValue() {
|
|
var array = this.__wrapped__.value(),
|
|
dir = this.__dir__,
|
|
isArr = isArray(array),
|
|
isRight = dir < 0,
|
|
arrLength = isArr ? array.length : 0,
|
|
view = getView(0, arrLength, this.__views__),
|
|
start = view.start,
|
|
end = view.end,
|
|
length = end - start,
|
|
index = isRight ? end : (start - 1),
|
|
iteratees = this.__iteratees__,
|
|
iterLength = iteratees.length,
|
|
resIndex = 0,
|
|
takeCount = nativeMin(length, this.__takeCount__);
|
|
|
|
if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
|
|
return baseWrapperValue(array, this.__actions__);
|
|
}
|
|
var result = [];
|
|
|
|
outer:
|
|
while (length-- && resIndex < takeCount) {
|
|
index += dir;
|
|
|
|
var iterIndex = -1,
|
|
value = array[index];
|
|
|
|
while (++iterIndex < iterLength) {
|
|
var data = iteratees[iterIndex],
|
|
iteratee = data.iteratee,
|
|
type = data.type,
|
|
computed = iteratee(value);
|
|
|
|
if (type == LAZY_MAP_FLAG) {
|
|
value = computed;
|
|
} else if (!computed) {
|
|
if (type == LAZY_FILTER_FLAG) {
|
|
continue outer;
|
|
} else {
|
|
break outer;
|
|
}
|
|
}
|
|
}
|
|
result[resIndex++] = value;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
// Ensure `LazyWrapper` is an instance of `baseLodash`.
|
|
LazyWrapper.prototype = baseCreate(baseLodash.prototype);
|
|
LazyWrapper.prototype.constructor = LazyWrapper;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a hash object.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {Array} [entries] The key-value pairs to cache.
|
|
*/
|
|
function Hash(entries) {
|
|
var index = -1,
|
|
length = entries == null ? 0 : entries.length;
|
|
|
|
this.clear();
|
|
while (++index < length) {
|
|
var entry = entries[index];
|
|
this.set(entry[0], entry[1]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes all key-value entries from the hash.
|
|
*
|
|
* @private
|
|
* @name clear
|
|
* @memberOf Hash
|
|
*/
|
|
function hashClear() {
|
|
this.__data__ = nativeCreate ? nativeCreate(null) : {};
|
|
this.size = 0;
|
|
}
|
|
|
|
/**
|
|
* Removes `key` and its value from the hash.
|
|
*
|
|
* @private
|
|
* @name delete
|
|
* @memberOf Hash
|
|
* @param {Object} hash The hash to modify.
|
|
* @param {string} key The key of the value to remove.
|
|
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
|
|
*/
|
|
function hashDelete(key) {
|
|
var result = this.has(key) && delete this.__data__[key];
|
|
this.size -= result ? 1 : 0;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the hash value for `key`.
|
|
*
|
|
* @private
|
|
* @name get
|
|
* @memberOf Hash
|
|
* @param {string} key The key of the value to get.
|
|
* @returns {*} Returns the entry value.
|
|
*/
|
|
function hashGet(key) {
|
|
var data = this.__data__;
|
|
if (nativeCreate) {
|
|
var result = data[key];
|
|
return result === HASH_UNDEFINED ? undefined : result;
|
|
}
|
|
return hasOwnProperty.call(data, key) ? data[key] : undefined;
|
|
}
|
|
|
|
/**
|
|
* Checks if a hash value for `key` exists.
|
|
*
|
|
* @private
|
|
* @name has
|
|
* @memberOf Hash
|
|
* @param {string} key The key of the entry to check.
|
|
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
|
|
*/
|
|
function hashHas(key) {
|
|
var data = this.__data__;
|
|
return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
|
|
}
|
|
|
|
/**
|
|
* Sets the hash `key` to `value`.
|
|
*
|
|
* @private
|
|
* @name set
|
|
* @memberOf Hash
|
|
* @param {string} key The key of the value to set.
|
|
* @param {*} value The value to set.
|
|
* @returns {Object} Returns the hash instance.
|
|
*/
|
|
function hashSet(key, value) {
|
|
var data = this.__data__;
|
|
this.size += this.has(key) ? 0 : 1;
|
|
data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
|
|
return this;
|
|
}
|
|
|
|
// Add methods to `Hash`.
|
|
Hash.prototype.clear = hashClear;
|
|
Hash.prototype['delete'] = hashDelete;
|
|
Hash.prototype.get = hashGet;
|
|
Hash.prototype.has = hashHas;
|
|
Hash.prototype.set = hashSet;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates an list cache object.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {Array} [entries] The key-value pairs to cache.
|
|
*/
|
|
function ListCache(entries) {
|
|
var index = -1,
|
|
length = entries == null ? 0 : entries.length;
|
|
|
|
this.clear();
|
|
while (++index < length) {
|
|
var entry = entries[index];
|
|
this.set(entry[0], entry[1]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes all key-value entries from the list cache.
|
|
*
|
|
* @private
|
|
* @name clear
|
|
* @memberOf ListCache
|
|
*/
|
|
function listCacheClear() {
|
|
this.__data__ = [];
|
|
this.size = 0;
|
|
}
|
|
|
|
/**
|
|
* Removes `key` and its value from the list cache.
|
|
*
|
|
* @private
|
|
* @name delete
|
|
* @memberOf ListCache
|
|
* @param {string} key The key of the value to remove.
|
|
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
|
|
*/
|
|
function listCacheDelete(key) {
|
|
var data = this.__data__,
|
|
index = assocIndexOf(data, key);
|
|
|
|
if (index < 0) {
|
|
return false;
|
|
}
|
|
var lastIndex = data.length - 1;
|
|
if (index == lastIndex) {
|
|
data.pop();
|
|
} else {
|
|
splice.call(data, index, 1);
|
|
}
|
|
--this.size;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Gets the list cache value for `key`.
|
|
*
|
|
* @private
|
|
* @name get
|
|
* @memberOf ListCache
|
|
* @param {string} key The key of the value to get.
|
|
* @returns {*} Returns the entry value.
|
|
*/
|
|
function listCacheGet(key) {
|
|
var data = this.__data__,
|
|
index = assocIndexOf(data, key);
|
|
|
|
return index < 0 ? undefined : data[index][1];
|
|
}
|
|
|
|
/**
|
|
* Checks if a list cache value for `key` exists.
|
|
*
|
|
* @private
|
|
* @name has
|
|
* @memberOf ListCache
|
|
* @param {string} key The key of the entry to check.
|
|
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
|
|
*/
|
|
function listCacheHas(key) {
|
|
return assocIndexOf(this.__data__, key) > -1;
|
|
}
|
|
|
|
/**
|
|
* Sets the list cache `key` to `value`.
|
|
*
|
|
* @private
|
|
* @name set
|
|
* @memberOf ListCache
|
|
* @param {string} key The key of the value to set.
|
|
* @param {*} value The value to set.
|
|
* @returns {Object} Returns the list cache instance.
|
|
*/
|
|
function listCacheSet(key, value) {
|
|
var data = this.__data__,
|
|
index = assocIndexOf(data, key);
|
|
|
|
if (index < 0) {
|
|
++this.size;
|
|
data.push([key, value]);
|
|
} else {
|
|
data[index][1] = value;
|
|
}
|
|
return this;
|
|
}
|
|
|
|
// Add methods to `ListCache`.
|
|
ListCache.prototype.clear = listCacheClear;
|
|
ListCache.prototype['delete'] = listCacheDelete;
|
|
ListCache.prototype.get = listCacheGet;
|
|
ListCache.prototype.has = listCacheHas;
|
|
ListCache.prototype.set = listCacheSet;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a map cache object to store key-value pairs.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {Array} [entries] The key-value pairs to cache.
|
|
*/
|
|
function MapCache(entries) {
|
|
var index = -1,
|
|
length = entries == null ? 0 : entries.length;
|
|
|
|
this.clear();
|
|
while (++index < length) {
|
|
var entry = entries[index];
|
|
this.set(entry[0], entry[1]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Removes all key-value entries from the map.
|
|
*
|
|
* @private
|
|
* @name clear
|
|
* @memberOf MapCache
|
|
*/
|
|
function mapCacheClear() {
|
|
this.size = 0;
|
|
this.__data__ = {
|
|
'hash': new Hash,
|
|
'map': new (Map || ListCache),
|
|
'string': new Hash
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Removes `key` and its value from the map.
|
|
*
|
|
* @private
|
|
* @name delete
|
|
* @memberOf MapCache
|
|
* @param {string} key The key of the value to remove.
|
|
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
|
|
*/
|
|
function mapCacheDelete(key) {
|
|
var result = getMapData(this, key)['delete'](key);
|
|
this.size -= result ? 1 : 0;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the map value for `key`.
|
|
*
|
|
* @private
|
|
* @name get
|
|
* @memberOf MapCache
|
|
* @param {string} key The key of the value to get.
|
|
* @returns {*} Returns the entry value.
|
|
*/
|
|
function mapCacheGet(key) {
|
|
return getMapData(this, key).get(key);
|
|
}
|
|
|
|
/**
|
|
* Checks if a map value for `key` exists.
|
|
*
|
|
* @private
|
|
* @name has
|
|
* @memberOf MapCache
|
|
* @param {string} key The key of the entry to check.
|
|
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
|
|
*/
|
|
function mapCacheHas(key) {
|
|
return getMapData(this, key).has(key);
|
|
}
|
|
|
|
/**
|
|
* Sets the map `key` to `value`.
|
|
*
|
|
* @private
|
|
* @name set
|
|
* @memberOf MapCache
|
|
* @param {string} key The key of the value to set.
|
|
* @param {*} value The value to set.
|
|
* @returns {Object} Returns the map cache instance.
|
|
*/
|
|
function mapCacheSet(key, value) {
|
|
var data = getMapData(this, key),
|
|
size = data.size;
|
|
|
|
data.set(key, value);
|
|
this.size += data.size == size ? 0 : 1;
|
|
return this;
|
|
}
|
|
|
|
// Add methods to `MapCache`.
|
|
MapCache.prototype.clear = mapCacheClear;
|
|
MapCache.prototype['delete'] = mapCacheDelete;
|
|
MapCache.prototype.get = mapCacheGet;
|
|
MapCache.prototype.has = mapCacheHas;
|
|
MapCache.prototype.set = mapCacheSet;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
*
|
|
* Creates an array cache object to store unique values.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {Array} [values] The values to cache.
|
|
*/
|
|
function SetCache(values) {
|
|
var index = -1,
|
|
length = values == null ? 0 : values.length;
|
|
|
|
this.__data__ = new MapCache;
|
|
while (++index < length) {
|
|
this.add(values[index]);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds `value` to the array cache.
|
|
*
|
|
* @private
|
|
* @name add
|
|
* @memberOf SetCache
|
|
* @alias push
|
|
* @param {*} value The value to cache.
|
|
* @returns {Object} Returns the cache instance.
|
|
*/
|
|
function setCacheAdd(value) {
|
|
this.__data__.set(value, HASH_UNDEFINED);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is in the array cache.
|
|
*
|
|
* @private
|
|
* @name has
|
|
* @memberOf SetCache
|
|
* @param {*} value The value to search for.
|
|
* @returns {number} Returns `true` if `value` is found, else `false`.
|
|
*/
|
|
function setCacheHas(value) {
|
|
return this.__data__.has(value);
|
|
}
|
|
|
|
// Add methods to `SetCache`.
|
|
SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
|
|
SetCache.prototype.has = setCacheHas;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a stack cache object to store key-value pairs.
|
|
*
|
|
* @private
|
|
* @constructor
|
|
* @param {Array} [entries] The key-value pairs to cache.
|
|
*/
|
|
function Stack(entries) {
|
|
var data = this.__data__ = new ListCache(entries);
|
|
this.size = data.size;
|
|
}
|
|
|
|
/**
|
|
* Removes all key-value entries from the stack.
|
|
*
|
|
* @private
|
|
* @name clear
|
|
* @memberOf Stack
|
|
*/
|
|
function stackClear() {
|
|
this.__data__ = new ListCache;
|
|
this.size = 0;
|
|
}
|
|
|
|
/**
|
|
* Removes `key` and its value from the stack.
|
|
*
|
|
* @private
|
|
* @name delete
|
|
* @memberOf Stack
|
|
* @param {string} key The key of the value to remove.
|
|
* @returns {boolean} Returns `true` if the entry was removed, else `false`.
|
|
*/
|
|
function stackDelete(key) {
|
|
var data = this.__data__,
|
|
result = data['delete'](key);
|
|
|
|
this.size = data.size;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the stack value for `key`.
|
|
*
|
|
* @private
|
|
* @name get
|
|
* @memberOf Stack
|
|
* @param {string} key The key of the value to get.
|
|
* @returns {*} Returns the entry value.
|
|
*/
|
|
function stackGet(key) {
|
|
return this.__data__.get(key);
|
|
}
|
|
|
|
/**
|
|
* Checks if a stack value for `key` exists.
|
|
*
|
|
* @private
|
|
* @name has
|
|
* @memberOf Stack
|
|
* @param {string} key The key of the entry to check.
|
|
* @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
|
|
*/
|
|
function stackHas(key) {
|
|
return this.__data__.has(key);
|
|
}
|
|
|
|
/**
|
|
* Sets the stack `key` to `value`.
|
|
*
|
|
* @private
|
|
* @name set
|
|
* @memberOf Stack
|
|
* @param {string} key The key of the value to set.
|
|
* @param {*} value The value to set.
|
|
* @returns {Object} Returns the stack cache instance.
|
|
*/
|
|
function stackSet(key, value) {
|
|
var data = this.__data__;
|
|
if (data instanceof ListCache) {
|
|
var pairs = data.__data__;
|
|
if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
|
|
pairs.push([key, value]);
|
|
this.size = ++data.size;
|
|
return this;
|
|
}
|
|
data = this.__data__ = new MapCache(pairs);
|
|
}
|
|
data.set(key, value);
|
|
this.size = data.size;
|
|
return this;
|
|
}
|
|
|
|
// Add methods to `Stack`.
|
|
Stack.prototype.clear = stackClear;
|
|
Stack.prototype['delete'] = stackDelete;
|
|
Stack.prototype.get = stackGet;
|
|
Stack.prototype.has = stackHas;
|
|
Stack.prototype.set = stackSet;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates an array of the enumerable property names of the array-like `value`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to query.
|
|
* @param {boolean} inherited Specify returning inherited property names.
|
|
* @returns {Array} Returns the array of property names.
|
|
*/
|
|
function arrayLikeKeys(value, inherited) {
|
|
var isArr = isArray(value),
|
|
isArg = !isArr && isArguments(value),
|
|
isBuff = !isArr && !isArg && isBuffer(value),
|
|
isType = !isArr && !isArg && !isBuff && isTypedArray(value),
|
|
skipIndexes = isArr || isArg || isBuff || isType,
|
|
result = skipIndexes ? baseTimes(value.length, String) : [],
|
|
length = result.length;
|
|
|
|
for (var key in value) {
|
|
if ((inherited || hasOwnProperty.call(value, key)) &&
|
|
!(skipIndexes && (
|
|
// Safari 9 has enumerable `arguments.length` in strict mode.
|
|
key == 'length' ||
|
|
// Node.js 0.10 has enumerable non-index properties on buffers.
|
|
(isBuff && (key == 'offset' || key == 'parent')) ||
|
|
// PhantomJS 2 has enumerable non-index properties on typed arrays.
|
|
(isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
|
|
// Skip index properties.
|
|
isIndex(key, length)
|
|
))) {
|
|
result.push(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This function is like `assignValue` except that it doesn't assign
|
|
* `undefined` values.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to modify.
|
|
* @param {string} key The key of the property to assign.
|
|
* @param {*} value The value to assign.
|
|
*/
|
|
function assignMergeValue(object, key, value) {
|
|
if ((value !== undefined && !eq(object[key], value)) ||
|
|
(value === undefined && !(key in object))) {
|
|
baseAssignValue(object, key, value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Assigns `value` to `key` of `object` if the existing value is not equivalent
|
|
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* for equality comparisons.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to modify.
|
|
* @param {string} key The key of the property to assign.
|
|
* @param {*} value The value to assign.
|
|
*/
|
|
function assignValue(object, key, value) {
|
|
var objValue = object[key];
|
|
if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
|
|
(value === undefined && !(key in object))) {
|
|
baseAssignValue(object, key, value);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Gets the index at which the `key` is found in `array` of key-value pairs.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} key The key to search for.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
*/
|
|
function assocIndexOf(array, key) {
|
|
var length = array.length;
|
|
while (length--) {
|
|
if (eq(array[length][0], key)) {
|
|
return length;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Aggregates elements of `collection` on `accumulator` with keys transformed
|
|
* by `iteratee` and values set by `setter`.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} setter The function to set `accumulator` values.
|
|
* @param {Function} iteratee The iteratee to transform keys.
|
|
* @param {Object} accumulator The initial aggregated object.
|
|
* @returns {Function} Returns `accumulator`.
|
|
*/
|
|
function baseAggregator(collection, setter, iteratee, accumulator) {
|
|
baseEach(collection, function(value, key, collection) {
|
|
setter(accumulator, value, iteratee(value), collection);
|
|
});
|
|
return accumulator;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.assign` without support for multiple sources
|
|
* or `customizer` functions.
|
|
*
|
|
* @private
|
|
* @param {Object} object The destination object.
|
|
* @param {Object} source The source object.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseAssign(object, source) {
|
|
return object && copyObject(source, keys(source), object);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.assignIn` without support for multiple sources
|
|
* or `customizer` functions.
|
|
*
|
|
* @private
|
|
* @param {Object} object The destination object.
|
|
* @param {Object} source The source object.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseAssignIn(object, source) {
|
|
return object && copyObject(source, keysIn(source), object);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `assignValue` and `assignMergeValue` without
|
|
* value checks.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to modify.
|
|
* @param {string} key The key of the property to assign.
|
|
* @param {*} value The value to assign.
|
|
*/
|
|
function baseAssignValue(object, key, value) {
|
|
if (key == '__proto__' && defineProperty) {
|
|
defineProperty(object, key, {
|
|
'configurable': true,
|
|
'enumerable': true,
|
|
'value': value,
|
|
'writable': true
|
|
});
|
|
} else {
|
|
object[key] = value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.at` without support for individual paths.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {string[]} paths The property paths to pick.
|
|
* @returns {Array} Returns the picked elements.
|
|
*/
|
|
function baseAt(object, paths) {
|
|
var index = -1,
|
|
length = paths.length,
|
|
result = Array(length),
|
|
skip = object == null;
|
|
|
|
while (++index < length) {
|
|
result[index] = skip ? undefined : get(object, paths[index]);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.clone` and `_.cloneDeep` which tracks
|
|
* traversed objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to clone.
|
|
* @param {boolean} bitmask The bitmask flags.
|
|
* 1 - Deep clone
|
|
* 2 - Flatten inherited properties
|
|
* 4 - Clone symbols
|
|
* @param {Function} [customizer] The function to customize cloning.
|
|
* @param {string} [key] The key of `value`.
|
|
* @param {Object} [object] The parent object of `value`.
|
|
* @param {Object} [stack] Tracks traversed objects and their clone counterparts.
|
|
* @returns {*} Returns the cloned value.
|
|
*/
|
|
function baseClone(value, bitmask, customizer, key, object, stack) {
|
|
var result,
|
|
isDeep = bitmask & CLONE_DEEP_FLAG,
|
|
isFlat = bitmask & CLONE_FLAT_FLAG,
|
|
isFull = bitmask & CLONE_SYMBOLS_FLAG;
|
|
|
|
if (customizer) {
|
|
result = object ? customizer(value, key, object, stack) : customizer(value);
|
|
}
|
|
if (result !== undefined) {
|
|
return result;
|
|
}
|
|
if (!isObject(value)) {
|
|
return value;
|
|
}
|
|
var isArr = isArray(value);
|
|
if (isArr) {
|
|
result = initCloneArray(value);
|
|
if (!isDeep) {
|
|
return copyArray(value, result);
|
|
}
|
|
} else {
|
|
var tag = getTag(value),
|
|
isFunc = tag == funcTag || tag == genTag;
|
|
|
|
if (isBuffer(value)) {
|
|
return cloneBuffer(value, isDeep);
|
|
}
|
|
if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
|
|
result = (isFlat || isFunc) ? {} : initCloneObject(value);
|
|
if (!isDeep) {
|
|
return isFlat
|
|
? copySymbolsIn(value, baseAssignIn(result, value))
|
|
: copySymbols(value, baseAssign(result, value));
|
|
}
|
|
} else {
|
|
if (!cloneableTags[tag]) {
|
|
return object ? value : {};
|
|
}
|
|
result = initCloneByTag(value, tag, isDeep);
|
|
}
|
|
}
|
|
// Check for circular references and return its corresponding clone.
|
|
stack || (stack = new Stack);
|
|
var stacked = stack.get(value);
|
|
if (stacked) {
|
|
return stacked;
|
|
}
|
|
stack.set(value, result);
|
|
|
|
if (isSet(value)) {
|
|
value.forEach(function(subValue) {
|
|
result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
|
|
});
|
|
|
|
return result;
|
|
}
|
|
|
|
if (isMap(value)) {
|
|
value.forEach(function(subValue, key) {
|
|
result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
|
|
});
|
|
|
|
return result;
|
|
}
|
|
|
|
var keysFunc = isFull
|
|
? (isFlat ? getAllKeysIn : getAllKeys)
|
|
: (isFlat ? keysIn : keys);
|
|
|
|
var props = isArr ? undefined : keysFunc(value);
|
|
arrayEach(props || value, function(subValue, key) {
|
|
if (props) {
|
|
key = subValue;
|
|
subValue = value[key];
|
|
}
|
|
// Recursively populate clone (susceptible to call stack limits).
|
|
assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.delay` and `_.defer` which accepts `args`
|
|
* to provide to `func`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to delay.
|
|
* @param {number} wait The number of milliseconds to delay invocation.
|
|
* @param {Array} args The arguments to provide to `func`.
|
|
* @returns {number|Object} Returns the timer id or timeout object.
|
|
*/
|
|
function baseDelay(func, wait, args) {
|
|
if (typeof func != 'function') {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
return setTimeout(function() { func.apply(undefined, args); }, wait);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of methods like `_.difference` without support
|
|
* for excluding multiple arrays or iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Array} values The values to exclude.
|
|
* @param {Function} [iteratee] The iteratee invoked per element.
|
|
* @param {Function} [comparator] The comparator invoked per element.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
*/
|
|
function baseDifference(array, values, iteratee, comparator) {
|
|
var index = -1,
|
|
includes = arrayIncludes,
|
|
isCommon = true,
|
|
length = array.length,
|
|
result = [],
|
|
valuesLength = values.length;
|
|
|
|
if (!length) {
|
|
return result;
|
|
}
|
|
if (iteratee) {
|
|
values = arrayMap(values, baseUnary(iteratee));
|
|
}
|
|
if (comparator) {
|
|
includes = arrayIncludesWith;
|
|
isCommon = false;
|
|
}
|
|
else if (values.length >= LARGE_ARRAY_SIZE) {
|
|
includes = cacheHas;
|
|
isCommon = false;
|
|
values = new SetCache(values);
|
|
}
|
|
outer:
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
computed = iteratee == null ? value : iteratee(value);
|
|
|
|
value = (comparator || value !== 0) ? value : 0;
|
|
if (isCommon && computed === computed) {
|
|
var valuesIndex = valuesLength;
|
|
while (valuesIndex--) {
|
|
if (values[valuesIndex] === computed) {
|
|
continue outer;
|
|
}
|
|
}
|
|
result.push(value);
|
|
}
|
|
else if (!includes(values, computed, comparator)) {
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forEach` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array|Object} Returns `collection`.
|
|
*/
|
|
var baseEach = createBaseEach(baseForOwn);
|
|
|
|
/**
|
|
* The base implementation of `_.every` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {boolean} Returns `true` if all elements pass the predicate check,
|
|
* else `false`
|
|
*/
|
|
function baseEvery(collection, predicate) {
|
|
var result = true;
|
|
baseEach(collection, function(value, index, collection) {
|
|
result = !!predicate(value, index, collection);
|
|
return result;
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of methods like `_.max` and `_.min` which accepts a
|
|
* `comparator` to determine the extremum value.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to iterate over.
|
|
* @param {Function} iteratee The iteratee invoked per iteration.
|
|
* @param {Function} comparator The comparator used to compare values.
|
|
* @returns {*} Returns the extremum value.
|
|
*/
|
|
function baseExtremum(array, iteratee, comparator) {
|
|
var index = -1,
|
|
length = array.length;
|
|
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
current = iteratee(value);
|
|
|
|
if (current != null && (computed === undefined
|
|
? (current === current && !isSymbol(current))
|
|
: comparator(current, computed)
|
|
)) {
|
|
var computed = current,
|
|
result = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.filter` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {Array} Returns the new filtered array.
|
|
*/
|
|
function baseFilter(collection, predicate) {
|
|
var result = [];
|
|
baseEach(collection, function(value, index, collection) {
|
|
if (predicate(value, index, collection)) {
|
|
result.push(value);
|
|
}
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.flatten` with support for restricting flattening.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to flatten.
|
|
* @param {number} depth The maximum recursion depth.
|
|
* @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
|
|
* @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
|
|
* @param {Array} [result=[]] The initial result value.
|
|
* @returns {Array} Returns the new flattened array.
|
|
*/
|
|
function baseFlatten(array, depth, predicate, isStrict, result) {
|
|
var index = -1,
|
|
length = array.length;
|
|
|
|
predicate || (predicate = isFlattenable);
|
|
result || (result = []);
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
if (depth > 0 && predicate(value)) {
|
|
if (depth > 1) {
|
|
// Recursively flatten arrays (susceptible to call stack limits).
|
|
baseFlatten(value, depth - 1, predicate, isStrict, result);
|
|
} else {
|
|
arrayPush(result, value);
|
|
}
|
|
} else if (!isStrict) {
|
|
result[result.length] = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `baseForOwn` which iterates over `object`
|
|
* properties returned by `keysFunc` and invokes `iteratee` for each property.
|
|
* Iteratee functions may exit iteration early by explicitly returning `false`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {Function} keysFunc The function to get the keys of `object`.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
var baseFor = createBaseFor();
|
|
|
|
/**
|
|
* The base implementation of `_.forOwn` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForOwn(object, iteratee) {
|
|
return object && baseFor(object, iteratee, keys);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.functions` which creates an array of
|
|
* `object` function property names filtered from `props`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to inspect.
|
|
* @param {Array} props The property names to filter.
|
|
* @returns {Array} Returns the function names.
|
|
*/
|
|
function baseFunctions(object, props) {
|
|
return arrayFilter(props, function(key) {
|
|
return isFunction(object[key]);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.get` without support for default values.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path of the property to get.
|
|
* @returns {*} Returns the resolved value.
|
|
*/
|
|
function baseGet(object, path) {
|
|
path = castPath(path, object);
|
|
|
|
var index = 0,
|
|
length = path.length;
|
|
|
|
while (object != null && index < length) {
|
|
object = object[toKey(path[index++])];
|
|
}
|
|
return (index && index == length) ? object : undefined;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `getAllKeys` and `getAllKeysIn` which uses
|
|
* `keysFunc` and `symbolsFunc` to get the enumerable property names and
|
|
* symbols of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Function} keysFunc The function to get the keys of `object`.
|
|
* @param {Function} symbolsFunc The function to get the symbols of `object`.
|
|
* @returns {Array} Returns the array of property names and symbols.
|
|
*/
|
|
function baseGetAllKeys(object, keysFunc, symbolsFunc) {
|
|
var result = keysFunc(object);
|
|
return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `getTag` without fallbacks for buggy environments.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to query.
|
|
* @returns {string} Returns the `toStringTag`.
|
|
*/
|
|
function baseGetTag(value) {
|
|
if (value == null) {
|
|
return value === undefined ? undefinedTag : nullTag;
|
|
}
|
|
return (symToStringTag && symToStringTag in Object(value))
|
|
? getRawTag(value)
|
|
: objectToString(value);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.gt` which doesn't coerce arguments.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @returns {boolean} Returns `true` if `value` is greater than `other`,
|
|
* else `false`.
|
|
*/
|
|
function baseGt(value, other) {
|
|
return value > other;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.hasIn` without support for deep paths.
|
|
*
|
|
* @private
|
|
* @param {Object} [object] The object to query.
|
|
* @param {Array|string} key The key to check.
|
|
* @returns {boolean} Returns `true` if `key` exists, else `false`.
|
|
*/
|
|
function baseHasIn(object, key) {
|
|
return object != null && key in Object(object);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of methods like `_.intersection`, without support
|
|
* for iteratee shorthands, that accepts an array of arrays to inspect.
|
|
*
|
|
* @private
|
|
* @param {Array} arrays The arrays to inspect.
|
|
* @param {Function} [iteratee] The iteratee invoked per element.
|
|
* @param {Function} [comparator] The comparator invoked per element.
|
|
* @returns {Array} Returns the new array of shared values.
|
|
*/
|
|
function baseIntersection(arrays, iteratee, comparator) {
|
|
var includes = comparator ? arrayIncludesWith : arrayIncludes,
|
|
length = arrays[0].length,
|
|
othLength = arrays.length,
|
|
othIndex = othLength,
|
|
caches = Array(othLength),
|
|
maxLength = Infinity,
|
|
result = [];
|
|
|
|
while (othIndex--) {
|
|
var array = arrays[othIndex];
|
|
if (othIndex && iteratee) {
|
|
array = arrayMap(array, baseUnary(iteratee));
|
|
}
|
|
maxLength = nativeMin(array.length, maxLength);
|
|
caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
|
|
? new SetCache(othIndex && array)
|
|
: undefined;
|
|
}
|
|
array = arrays[0];
|
|
|
|
var index = -1,
|
|
seen = caches[0];
|
|
|
|
outer:
|
|
while (++index < length && result.length < maxLength) {
|
|
var value = array[index],
|
|
computed = iteratee ? iteratee(value) : value;
|
|
|
|
value = (comparator || value !== 0) ? value : 0;
|
|
if (!(seen
|
|
? cacheHas(seen, computed)
|
|
: includes(result, computed, comparator)
|
|
)) {
|
|
othIndex = othLength;
|
|
while (--othIndex) {
|
|
var cache = caches[othIndex];
|
|
if (!(cache
|
|
? cacheHas(cache, computed)
|
|
: includes(arrays[othIndex], computed, comparator))
|
|
) {
|
|
continue outer;
|
|
}
|
|
}
|
|
if (seen) {
|
|
seen.push(computed);
|
|
}
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.invoke` without support for individual
|
|
* method arguments.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path of the method to invoke.
|
|
* @param {Array} args The arguments to invoke the method with.
|
|
* @returns {*} Returns the result of the invoked method.
|
|
*/
|
|
function baseInvoke(object, path, args) {
|
|
path = castPath(path, object);
|
|
object = parent(object, path);
|
|
var func = object == null ? object : object[toKey(last(path))];
|
|
return func == null ? undefined : apply(func, object, args);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isArguments`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
|
|
*/
|
|
function baseIsArguments(value) {
|
|
return isObjectLike(value) && baseGetTag(value) == argsTag;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isEqual` which supports partial comparisons
|
|
* and tracks traversed objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @param {boolean} bitmask The bitmask flags.
|
|
* 1 - Unordered comparison
|
|
* 2 - Partial comparison
|
|
* @param {Function} [customizer] The function to customize comparisons.
|
|
* @param {Object} [stack] Tracks traversed `value` and `other` objects.
|
|
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
|
|
*/
|
|
function baseIsEqual(value, other, bitmask, customizer, stack) {
|
|
if (value === other) {
|
|
return true;
|
|
}
|
|
if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
|
|
return value !== value && other !== other;
|
|
}
|
|
return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseIsEqual` for arrays and objects which performs
|
|
* deep comparisons and tracks traversed objects enabling objects with circular
|
|
* references to be compared.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare.
|
|
* @param {Object} other The other object to compare.
|
|
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
|
|
* @param {Function} customizer The function to customize comparisons.
|
|
* @param {Function} equalFunc The function to determine equivalents of values.
|
|
* @param {Object} [stack] Tracks traversed `object` and `other` objects.
|
|
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
|
|
*/
|
|
function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
|
|
var objIsArr = isArray(object),
|
|
othIsArr = isArray(other),
|
|
objTag = objIsArr ? arrayTag : getTag(object),
|
|
othTag = othIsArr ? arrayTag : getTag(other);
|
|
|
|
objTag = objTag == argsTag ? objectTag : objTag;
|
|
othTag = othTag == argsTag ? objectTag : othTag;
|
|
|
|
var objIsObj = objTag == objectTag,
|
|
othIsObj = othTag == objectTag,
|
|
isSameTag = objTag == othTag;
|
|
|
|
if (isSameTag && isBuffer(object)) {
|
|
if (!isBuffer(other)) {
|
|
return false;
|
|
}
|
|
objIsArr = true;
|
|
objIsObj = false;
|
|
}
|
|
if (isSameTag && !objIsObj) {
|
|
stack || (stack = new Stack);
|
|
return (objIsArr || isTypedArray(object))
|
|
? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
|
|
: equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
|
|
}
|
|
if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
|
|
var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
|
|
othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
|
|
|
|
if (objIsWrapped || othIsWrapped) {
|
|
var objUnwrapped = objIsWrapped ? object.value() : object,
|
|
othUnwrapped = othIsWrapped ? other.value() : other;
|
|
|
|
stack || (stack = new Stack);
|
|
return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
|
|
}
|
|
}
|
|
if (!isSameTag) {
|
|
return false;
|
|
}
|
|
stack || (stack = new Stack);
|
|
return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isMap` without Node.js optimizations.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a map, else `false`.
|
|
*/
|
|
function baseIsMap(value) {
|
|
return isObjectLike(value) && getTag(value) == mapTag;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isMatch` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to inspect.
|
|
* @param {Object} source The object of property values to match.
|
|
* @param {Array} matchData The property names, values, and compare flags to match.
|
|
* @param {Function} [customizer] The function to customize comparisons.
|
|
* @returns {boolean} Returns `true` if `object` is a match, else `false`.
|
|
*/
|
|
function baseIsMatch(object, source, matchData, customizer) {
|
|
var index = matchData.length,
|
|
length = index,
|
|
noCustomizer = !customizer;
|
|
|
|
if (object == null) {
|
|
return !length;
|
|
}
|
|
object = Object(object);
|
|
while (index--) {
|
|
var data = matchData[index];
|
|
if ((noCustomizer && data[2])
|
|
? data[1] !== object[data[0]]
|
|
: !(data[0] in object)
|
|
) {
|
|
return false;
|
|
}
|
|
}
|
|
while (++index < length) {
|
|
data = matchData[index];
|
|
var key = data[0],
|
|
objValue = object[key],
|
|
srcValue = data[1];
|
|
|
|
if (noCustomizer && data[2]) {
|
|
if (objValue === undefined && !(key in object)) {
|
|
return false;
|
|
}
|
|
} else {
|
|
var stack = new Stack;
|
|
if (customizer) {
|
|
var result = customizer(objValue, srcValue, key, object, source, stack);
|
|
}
|
|
if (!(result === undefined
|
|
? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
|
|
: result
|
|
)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isNative` without bad shim checks.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a native function,
|
|
* else `false`.
|
|
*/
|
|
function baseIsNative(value) {
|
|
if (!isObject(value) || isMasked(value)) {
|
|
return false;
|
|
}
|
|
var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
|
|
return pattern.test(toSource(value));
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isSet` without Node.js optimizations.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a set, else `false`.
|
|
*/
|
|
function baseIsSet(value) {
|
|
return isObjectLike(value) && getTag(value) == setTag;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isTypedArray` without Node.js optimizations.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
|
|
*/
|
|
function baseIsTypedArray(value) {
|
|
return isObjectLike(value) &&
|
|
isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.iteratee`.
|
|
*
|
|
* @private
|
|
* @param {*} [value=_.identity] The value to convert to an iteratee.
|
|
* @returns {Function} Returns the iteratee.
|
|
*/
|
|
function baseIteratee(value) {
|
|
// Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
|
|
// See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
|
|
if (typeof value == 'function') {
|
|
return value;
|
|
}
|
|
if (value == null) {
|
|
return identity;
|
|
}
|
|
if (typeof value == 'object') {
|
|
return isArray(value)
|
|
? baseMatchesProperty(value[0], value[1])
|
|
: baseMatches(value);
|
|
}
|
|
return property(value);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
*/
|
|
function baseKeys(object) {
|
|
if (!isPrototype(object)) {
|
|
return nativeKeys(object);
|
|
}
|
|
var result = [];
|
|
for (var key in Object(object)) {
|
|
if (hasOwnProperty.call(object, key) && key != 'constructor') {
|
|
result.push(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
*/
|
|
function baseKeysIn(object) {
|
|
if (!isObject(object)) {
|
|
return nativeKeysIn(object);
|
|
}
|
|
var isProto = isPrototype(object),
|
|
result = [];
|
|
|
|
for (var key in object) {
|
|
if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
|
|
result.push(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.lt` which doesn't coerce arguments.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @returns {boolean} Returns `true` if `value` is less than `other`,
|
|
* else `false`.
|
|
*/
|
|
function baseLt(value, other) {
|
|
return value < other;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.map` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array} Returns the new mapped array.
|
|
*/
|
|
function baseMap(collection, iteratee) {
|
|
var index = -1,
|
|
result = isArrayLike(collection) ? Array(collection.length) : [];
|
|
|
|
baseEach(collection, function(value, key, collection) {
|
|
result[++index] = iteratee(value, key, collection);
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.matches` which doesn't clone `source`.
|
|
*
|
|
* @private
|
|
* @param {Object} source The object of property values to match.
|
|
* @returns {Function} Returns the new spec function.
|
|
*/
|
|
function baseMatches(source) {
|
|
var matchData = getMatchData(source);
|
|
if (matchData.length == 1 && matchData[0][2]) {
|
|
return matchesStrictComparable(matchData[0][0], matchData[0][1]);
|
|
}
|
|
return function(object) {
|
|
return object === source || baseIsMatch(object, source, matchData);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
|
|
*
|
|
* @private
|
|
* @param {string} path The path of the property to get.
|
|
* @param {*} srcValue The value to match.
|
|
* @returns {Function} Returns the new spec function.
|
|
*/
|
|
function baseMatchesProperty(path, srcValue) {
|
|
if (isKey(path) && isStrictComparable(srcValue)) {
|
|
return matchesStrictComparable(toKey(path), srcValue);
|
|
}
|
|
return function(object) {
|
|
var objValue = get(object, path);
|
|
return (objValue === undefined && objValue === srcValue)
|
|
? hasIn(object, path)
|
|
: baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.merge` without support for multiple sources.
|
|
*
|
|
* @private
|
|
* @param {Object} object The destination object.
|
|
* @param {Object} source The source object.
|
|
* @param {number} srcIndex The index of `source`.
|
|
* @param {Function} [customizer] The function to customize merged values.
|
|
* @param {Object} [stack] Tracks traversed source values and their merged
|
|
* counterparts.
|
|
*/
|
|
function baseMerge(object, source, srcIndex, customizer, stack) {
|
|
if (object === source) {
|
|
return;
|
|
}
|
|
baseFor(source, function(srcValue, key) {
|
|
if (isObject(srcValue)) {
|
|
stack || (stack = new Stack);
|
|
baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
|
|
}
|
|
else {
|
|
var newValue = customizer
|
|
? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
|
|
: undefined;
|
|
|
|
if (newValue === undefined) {
|
|
newValue = srcValue;
|
|
}
|
|
assignMergeValue(object, key, newValue);
|
|
}
|
|
}, keysIn);
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseMerge` for arrays and objects which performs
|
|
* deep merges and tracks traversed objects enabling objects with circular
|
|
* references to be merged.
|
|
*
|
|
* @private
|
|
* @param {Object} object The destination object.
|
|
* @param {Object} source The source object.
|
|
* @param {string} key The key of the value to merge.
|
|
* @param {number} srcIndex The index of `source`.
|
|
* @param {Function} mergeFunc The function to merge values.
|
|
* @param {Function} [customizer] The function to customize assigned values.
|
|
* @param {Object} [stack] Tracks traversed source values and their merged
|
|
* counterparts.
|
|
*/
|
|
function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
|
|
var objValue = safeGet(object, key),
|
|
srcValue = safeGet(source, key),
|
|
stacked = stack.get(srcValue);
|
|
|
|
if (stacked) {
|
|
assignMergeValue(object, key, stacked);
|
|
return;
|
|
}
|
|
var newValue = customizer
|
|
? customizer(objValue, srcValue, (key + ''), object, source, stack)
|
|
: undefined;
|
|
|
|
var isCommon = newValue === undefined;
|
|
|
|
if (isCommon) {
|
|
var isArr = isArray(srcValue),
|
|
isBuff = !isArr && isBuffer(srcValue),
|
|
isTyped = !isArr && !isBuff && isTypedArray(srcValue);
|
|
|
|
newValue = srcValue;
|
|
if (isArr || isBuff || isTyped) {
|
|
if (isArray(objValue)) {
|
|
newValue = objValue;
|
|
}
|
|
else if (isArrayLikeObject(objValue)) {
|
|
newValue = copyArray(objValue);
|
|
}
|
|
else if (isBuff) {
|
|
isCommon = false;
|
|
newValue = cloneBuffer(srcValue, true);
|
|
}
|
|
else if (isTyped) {
|
|
isCommon = false;
|
|
newValue = cloneTypedArray(srcValue, true);
|
|
}
|
|
else {
|
|
newValue = [];
|
|
}
|
|
}
|
|
else if (isPlainObject(srcValue) || isArguments(srcValue)) {
|
|
newValue = objValue;
|
|
if (isArguments(objValue)) {
|
|
newValue = toPlainObject(objValue);
|
|
}
|
|
else if (!isObject(objValue) || isFunction(objValue)) {
|
|
newValue = initCloneObject(srcValue);
|
|
}
|
|
}
|
|
else {
|
|
isCommon = false;
|
|
}
|
|
}
|
|
if (isCommon) {
|
|
// Recursively merge objects and arrays (susceptible to call stack limits).
|
|
stack.set(srcValue, newValue);
|
|
mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
|
|
stack['delete'](srcValue);
|
|
}
|
|
assignMergeValue(object, key, newValue);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.orderBy` without param guards.
|
|
*
|
|
* @private
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
|
|
* @param {string[]} orders The sort orders of `iteratees`.
|
|
* @returns {Array} Returns the new sorted array.
|
|
*/
|
|
function baseOrderBy(collection, iteratees, orders) {
|
|
var index = -1;
|
|
iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
|
|
|
|
var result = baseMap(collection, function(value, key, collection) {
|
|
var criteria = arrayMap(iteratees, function(iteratee) {
|
|
return iteratee(value);
|
|
});
|
|
return { 'criteria': criteria, 'index': ++index, 'value': value };
|
|
});
|
|
|
|
return baseSortBy(result, function(object, other) {
|
|
return compareMultiple(object, other, orders);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.pick` without support for individual
|
|
* property identifiers.
|
|
*
|
|
* @private
|
|
* @param {Object} object The source object.
|
|
* @param {string[]} paths The property paths to pick.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
function basePick(object, paths) {
|
|
return basePickBy(object, paths, function(value, path) {
|
|
return hasIn(object, path);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.pickBy` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Object} object The source object.
|
|
* @param {string[]} paths The property paths to pick.
|
|
* @param {Function} predicate The function invoked per property.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
function basePickBy(object, paths, predicate) {
|
|
var index = -1,
|
|
length = paths.length,
|
|
result = {};
|
|
|
|
while (++index < length) {
|
|
var path = paths[index],
|
|
value = baseGet(object, path);
|
|
|
|
if (predicate(value, path)) {
|
|
baseSet(result, castPath(path, object), value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseProperty` which supports deep paths.
|
|
*
|
|
* @private
|
|
* @param {Array|string} path The path of the property to get.
|
|
* @returns {Function} Returns the new accessor function.
|
|
*/
|
|
function basePropertyDeep(path) {
|
|
return function(object) {
|
|
return baseGet(object, path);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.range` and `_.rangeRight` which doesn't
|
|
* coerce arguments.
|
|
*
|
|
* @private
|
|
* @param {number} start The start of the range.
|
|
* @param {number} end The end of the range.
|
|
* @param {number} step The value to increment or decrement by.
|
|
* @param {boolean} [fromRight] Specify iterating from right to left.
|
|
* @returns {Array} Returns the range of numbers.
|
|
*/
|
|
function baseRange(start, end, step, fromRight) {
|
|
var index = -1,
|
|
length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
|
|
result = Array(length);
|
|
|
|
while (length--) {
|
|
result[fromRight ? length : ++index] = start;
|
|
start += step;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.rest` which doesn't validate or coerce arguments.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to apply a rest parameter to.
|
|
* @param {number} [start=func.length-1] The start position of the rest parameter.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function baseRest(func, start) {
|
|
return setToString(overRest(func, start, identity), func + '');
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.set`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to modify.
|
|
* @param {Array|string} path The path of the property to set.
|
|
* @param {*} value The value to set.
|
|
* @param {Function} [customizer] The function to customize path creation.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseSet(object, path, value, customizer) {
|
|
if (!isObject(object)) {
|
|
return object;
|
|
}
|
|
path = castPath(path, object);
|
|
|
|
var index = -1,
|
|
length = path.length,
|
|
lastIndex = length - 1,
|
|
nested = object;
|
|
|
|
while (nested != null && ++index < length) {
|
|
var key = toKey(path[index]),
|
|
newValue = value;
|
|
|
|
if (index != lastIndex) {
|
|
var objValue = nested[key];
|
|
newValue = customizer ? customizer(objValue, key, nested) : undefined;
|
|
if (newValue === undefined) {
|
|
newValue = isObject(objValue)
|
|
? objValue
|
|
: (isIndex(path[index + 1]) ? [] : {});
|
|
}
|
|
}
|
|
assignValue(nested, key, newValue);
|
|
nested = nested[key];
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `setData` without support for hot loop shorting.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to associate metadata with.
|
|
* @param {*} data The metadata.
|
|
* @returns {Function} Returns `func`.
|
|
*/
|
|
var baseSetData = !metaMap ? identity : function(func, data) {
|
|
metaMap.set(func, data);
|
|
return func;
|
|
};
|
|
|
|
/**
|
|
* The base implementation of `setToString` without support for hot loop shorting.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to modify.
|
|
* @param {Function} string The `toString` result.
|
|
* @returns {Function} Returns `func`.
|
|
*/
|
|
var baseSetToString = !defineProperty ? identity : function(func, string) {
|
|
return defineProperty(func, 'toString', {
|
|
'configurable': true,
|
|
'enumerable': false,
|
|
'value': constant(string),
|
|
'writable': true
|
|
});
|
|
};
|
|
|
|
/**
|
|
* The base implementation of `_.slice` without an iteratee call guard.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to slice.
|
|
* @param {number} [start=0] The start position.
|
|
* @param {number} [end=array.length] The end position.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
*/
|
|
function baseSlice(array, start, end) {
|
|
var index = -1,
|
|
length = array.length;
|
|
|
|
if (start < 0) {
|
|
start = -start > length ? 0 : (length + start);
|
|
}
|
|
end = end > length ? length : end;
|
|
if (end < 0) {
|
|
end += length;
|
|
}
|
|
length = start > end ? 0 : ((end - start) >>> 0);
|
|
start >>>= 0;
|
|
|
|
var result = Array(length);
|
|
while (++index < length) {
|
|
result[index] = array[index + start];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.toString` which doesn't convert nullish
|
|
* values to empty strings.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to process.
|
|
* @returns {string} Returns the string.
|
|
*/
|
|
function baseToString(value) {
|
|
// Exit early for strings to avoid a performance hit in some environments.
|
|
if (typeof value == 'string') {
|
|
return value;
|
|
}
|
|
if (isArray(value)) {
|
|
// Recursively convert values (susceptible to call stack limits).
|
|
return arrayMap(value, baseToString) + '';
|
|
}
|
|
if (isSymbol(value)) {
|
|
return symbolToString ? symbolToString.call(value) : '';
|
|
}
|
|
var result = (value + '');
|
|
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.uniqBy` without support for iteratee shorthands.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Function} [iteratee] The iteratee invoked per element.
|
|
* @param {Function} [comparator] The comparator invoked per element.
|
|
* @returns {Array} Returns the new duplicate free array.
|
|
*/
|
|
function baseUniq(array, iteratee, comparator) {
|
|
var index = -1,
|
|
includes = arrayIncludes,
|
|
length = array.length,
|
|
isCommon = true,
|
|
result = [],
|
|
seen = result;
|
|
|
|
if (comparator) {
|
|
isCommon = false;
|
|
includes = arrayIncludesWith;
|
|
}
|
|
else if (length >= LARGE_ARRAY_SIZE) {
|
|
var set = iteratee ? null : createSet(array);
|
|
if (set) {
|
|
return setToArray(set);
|
|
}
|
|
isCommon = false;
|
|
includes = cacheHas;
|
|
seen = new SetCache;
|
|
}
|
|
else {
|
|
seen = iteratee ? [] : result;
|
|
}
|
|
outer:
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
computed = iteratee ? iteratee(value) : value;
|
|
|
|
value = (comparator || value !== 0) ? value : 0;
|
|
if (isCommon && computed === computed) {
|
|
var seenIndex = seen.length;
|
|
while (seenIndex--) {
|
|
if (seen[seenIndex] === computed) {
|
|
continue outer;
|
|
}
|
|
}
|
|
if (iteratee) {
|
|
seen.push(computed);
|
|
}
|
|
result.push(value);
|
|
}
|
|
else if (!includes(seen, computed, comparator)) {
|
|
if (seen !== result) {
|
|
seen.push(computed);
|
|
}
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.unset`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to modify.
|
|
* @param {Array|string} path The property path to unset.
|
|
* @returns {boolean} Returns `true` if the property is deleted, else `false`.
|
|
*/
|
|
function baseUnset(object, path) {
|
|
path = castPath(path, object);
|
|
object = parent(object, path);
|
|
return object == null || delete object[toKey(last(path))];
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `wrapperValue` which returns the result of
|
|
* performing a sequence of actions on the unwrapped `value`, where each
|
|
* successive action is supplied the return value of the previous.
|
|
*
|
|
* @private
|
|
* @param {*} value The unwrapped value.
|
|
* @param {Array} actions Actions to perform to resolve the unwrapped value.
|
|
* @returns {*} Returns the resolved value.
|
|
*/
|
|
function baseWrapperValue(value, actions) {
|
|
var result = value;
|
|
if (result instanceof LazyWrapper) {
|
|
result = result.value();
|
|
}
|
|
return arrayReduce(actions, function(result, action) {
|
|
return action.func.apply(action.thisArg, arrayPush([result], action.args));
|
|
}, result);
|
|
}
|
|
|
|
/**
|
|
* Casts `value` to an empty array if it's not an array like object.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to inspect.
|
|
* @returns {Array|Object} Returns the cast array-like object.
|
|
*/
|
|
function castArrayLikeObject(value) {
|
|
return isArrayLikeObject(value) ? value : [];
|
|
}
|
|
|
|
/**
|
|
* Casts `value` to a path array if it's not one.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to inspect.
|
|
* @param {Object} [object] The object to query keys on.
|
|
* @returns {Array} Returns the cast property path array.
|
|
*/
|
|
function castPath(value, object) {
|
|
if (isArray(value)) {
|
|
return value;
|
|
}
|
|
return isKey(value, object) ? [value] : stringToPath(toString(value));
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `buffer`.
|
|
*
|
|
* @private
|
|
* @param {Buffer} buffer The buffer to clone.
|
|
* @param {boolean} [isDeep] Specify a deep clone.
|
|
* @returns {Buffer} Returns the cloned buffer.
|
|
*/
|
|
function cloneBuffer(buffer, isDeep) {
|
|
if (isDeep) {
|
|
return buffer.slice();
|
|
}
|
|
var length = buffer.length,
|
|
result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
|
|
|
|
buffer.copy(result);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `arrayBuffer`.
|
|
*
|
|
* @private
|
|
* @param {ArrayBuffer} arrayBuffer The array buffer to clone.
|
|
* @returns {ArrayBuffer} Returns the cloned array buffer.
|
|
*/
|
|
function cloneArrayBuffer(arrayBuffer) {
|
|
var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
|
|
new Uint8Array(result).set(new Uint8Array(arrayBuffer));
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `dataView`.
|
|
*
|
|
* @private
|
|
* @param {Object} dataView The data view to clone.
|
|
* @param {boolean} [isDeep] Specify a deep clone.
|
|
* @returns {Object} Returns the cloned data view.
|
|
*/
|
|
function cloneDataView(dataView, isDeep) {
|
|
var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
|
|
return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `regexp`.
|
|
*
|
|
* @private
|
|
* @param {Object} regexp The regexp to clone.
|
|
* @returns {Object} Returns the cloned regexp.
|
|
*/
|
|
function cloneRegExp(regexp) {
|
|
var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
|
|
result.lastIndex = regexp.lastIndex;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of the `symbol` object.
|
|
*
|
|
* @private
|
|
* @param {Object} symbol The symbol object to clone.
|
|
* @returns {Object} Returns the cloned symbol object.
|
|
*/
|
|
function cloneSymbol(symbol) {
|
|
return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `typedArray`.
|
|
*
|
|
* @private
|
|
* @param {Object} typedArray The typed array to clone.
|
|
* @param {boolean} [isDeep] Specify a deep clone.
|
|
* @returns {Object} Returns the cloned typed array.
|
|
*/
|
|
function cloneTypedArray(typedArray, isDeep) {
|
|
var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
|
|
return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
|
|
}
|
|
|
|
/**
|
|
* Compares values to sort them in ascending order.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @returns {number} Returns the sort order indicator for `value`.
|
|
*/
|
|
function compareAscending(value, other) {
|
|
if (value !== other) {
|
|
var valIsDefined = value !== undefined,
|
|
valIsNull = value === null,
|
|
valIsReflexive = value === value,
|
|
valIsSymbol = isSymbol(value);
|
|
|
|
var othIsDefined = other !== undefined,
|
|
othIsNull = other === null,
|
|
othIsReflexive = other === other,
|
|
othIsSymbol = isSymbol(other);
|
|
|
|
if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
|
|
(valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
|
|
(valIsNull && othIsDefined && othIsReflexive) ||
|
|
(!valIsDefined && othIsReflexive) ||
|
|
!valIsReflexive) {
|
|
return 1;
|
|
}
|
|
if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
|
|
(othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
|
|
(othIsNull && valIsDefined && valIsReflexive) ||
|
|
(!othIsDefined && valIsReflexive) ||
|
|
!othIsReflexive) {
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Used by `_.orderBy` to compare multiple properties of a value to another
|
|
* and stable sort them.
|
|
*
|
|
* If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
|
|
* specify an order of "desc" for descending or "asc" for ascending sort order
|
|
* of corresponding values.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare.
|
|
* @param {Object} other The other object to compare.
|
|
* @param {boolean[]|string[]} orders The order to sort by for each property.
|
|
* @returns {number} Returns the sort order indicator for `object`.
|
|
*/
|
|
function compareMultiple(object, other, orders) {
|
|
var index = -1,
|
|
objCriteria = object.criteria,
|
|
othCriteria = other.criteria,
|
|
length = objCriteria.length,
|
|
ordersLength = orders.length;
|
|
|
|
while (++index < length) {
|
|
var result = compareAscending(objCriteria[index], othCriteria[index]);
|
|
if (result) {
|
|
if (index >= ordersLength) {
|
|
return result;
|
|
}
|
|
var order = orders[index];
|
|
return result * (order == 'desc' ? -1 : 1);
|
|
}
|
|
}
|
|
// Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
|
|
// that causes it, under certain circumstances, to provide the same value for
|
|
// `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
|
|
// for more details.
|
|
//
|
|
// This also ensures a stable sort in V8 and other engines.
|
|
// See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
|
|
return object.index - other.index;
|
|
}
|
|
|
|
/**
|
|
* Creates an array that is the composition of partially applied arguments,
|
|
* placeholders, and provided arguments into a single array of arguments.
|
|
*
|
|
* @private
|
|
* @param {Array} args The provided arguments.
|
|
* @param {Array} partials The arguments to prepend to those provided.
|
|
* @param {Array} holders The `partials` placeholder indexes.
|
|
* @params {boolean} [isCurried] Specify composing for a curried function.
|
|
* @returns {Array} Returns the new array of composed arguments.
|
|
*/
|
|
function composeArgs(args, partials, holders, isCurried) {
|
|
var argsIndex = -1,
|
|
argsLength = args.length,
|
|
holdersLength = holders.length,
|
|
leftIndex = -1,
|
|
leftLength = partials.length,
|
|
rangeLength = nativeMax(argsLength - holdersLength, 0),
|
|
result = Array(leftLength + rangeLength),
|
|
isUncurried = !isCurried;
|
|
|
|
while (++leftIndex < leftLength) {
|
|
result[leftIndex] = partials[leftIndex];
|
|
}
|
|
while (++argsIndex < holdersLength) {
|
|
if (isUncurried || argsIndex < argsLength) {
|
|
result[holders[argsIndex]] = args[argsIndex];
|
|
}
|
|
}
|
|
while (rangeLength--) {
|
|
result[leftIndex++] = args[argsIndex++];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This function is like `composeArgs` except that the arguments composition
|
|
* is tailored for `_.partialRight`.
|
|
*
|
|
* @private
|
|
* @param {Array} args The provided arguments.
|
|
* @param {Array} partials The arguments to append to those provided.
|
|
* @param {Array} holders The `partials` placeholder indexes.
|
|
* @params {boolean} [isCurried] Specify composing for a curried function.
|
|
* @returns {Array} Returns the new array of composed arguments.
|
|
*/
|
|
function composeArgsRight(args, partials, holders, isCurried) {
|
|
var argsIndex = -1,
|
|
argsLength = args.length,
|
|
holdersIndex = -1,
|
|
holdersLength = holders.length,
|
|
rightIndex = -1,
|
|
rightLength = partials.length,
|
|
rangeLength = nativeMax(argsLength - holdersLength, 0),
|
|
result = Array(rangeLength + rightLength),
|
|
isUncurried = !isCurried;
|
|
|
|
while (++argsIndex < rangeLength) {
|
|
result[argsIndex] = args[argsIndex];
|
|
}
|
|
var offset = argsIndex;
|
|
while (++rightIndex < rightLength) {
|
|
result[offset + rightIndex] = partials[rightIndex];
|
|
}
|
|
while (++holdersIndex < holdersLength) {
|
|
if (isUncurried || argsIndex < argsLength) {
|
|
result[offset + holders[holdersIndex]] = args[argsIndex++];
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Copies the values of `source` to `array`.
|
|
*
|
|
* @private
|
|
* @param {Array} source The array to copy values from.
|
|
* @param {Array} [array=[]] The array to copy values to.
|
|
* @returns {Array} Returns `array`.
|
|
*/
|
|
function copyArray(source, array) {
|
|
var index = -1,
|
|
length = source.length;
|
|
|
|
array || (array = Array(length));
|
|
while (++index < length) {
|
|
array[index] = source[index];
|
|
}
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Copies properties of `source` to `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} source The object to copy properties from.
|
|
* @param {Array} props The property identifiers to copy.
|
|
* @param {Object} [object={}] The object to copy properties to.
|
|
* @param {Function} [customizer] The function to customize copied values.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function copyObject(source, props, object, customizer) {
|
|
var isNew = !object;
|
|
object || (object = {});
|
|
|
|
var index = -1,
|
|
length = props.length;
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
|
|
var newValue = customizer
|
|
? customizer(object[key], source[key], key, object, source)
|
|
: undefined;
|
|
|
|
if (newValue === undefined) {
|
|
newValue = source[key];
|
|
}
|
|
if (isNew) {
|
|
baseAssignValue(object, key, newValue);
|
|
} else {
|
|
assignValue(object, key, newValue);
|
|
}
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* Copies own symbols of `source` to `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} source The object to copy symbols from.
|
|
* @param {Object} [object={}] The object to copy symbols to.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function copySymbols(source, object) {
|
|
return copyObject(source, getSymbols(source), object);
|
|
}
|
|
|
|
/**
|
|
* Copies own and inherited symbols of `source` to `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} source The object to copy symbols from.
|
|
* @param {Object} [object={}] The object to copy symbols to.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function copySymbolsIn(source, object) {
|
|
return copyObject(source, getSymbolsIn(source), object);
|
|
}
|
|
|
|
/**
|
|
* Creates a function like `_.groupBy`.
|
|
*
|
|
* @private
|
|
* @param {Function} setter The function to set accumulator values.
|
|
* @param {Function} [initializer] The accumulator object initializer.
|
|
* @returns {Function} Returns the new aggregator function.
|
|
*/
|
|
function createAggregator(setter, initializer) {
|
|
return function(collection, iteratee) {
|
|
var func = isArray(collection) ? arrayAggregator : baseAggregator,
|
|
accumulator = initializer ? initializer() : {};
|
|
|
|
return func(collection, setter, getIteratee(iteratee, 2), accumulator);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function like `_.assign`.
|
|
*
|
|
* @private
|
|
* @param {Function} assigner The function to assign values.
|
|
* @returns {Function} Returns the new assigner function.
|
|
*/
|
|
function createAssigner(assigner) {
|
|
return baseRest(function(object, sources) {
|
|
var index = -1,
|
|
length = sources.length,
|
|
customizer = length > 1 ? sources[length - 1] : undefined,
|
|
guard = length > 2 ? sources[2] : undefined;
|
|
|
|
customizer = (assigner.length > 3 && typeof customizer == 'function')
|
|
? (length--, customizer)
|
|
: undefined;
|
|
|
|
if (guard && isIterateeCall(sources[0], sources[1], guard)) {
|
|
customizer = length < 3 ? undefined : customizer;
|
|
length = 1;
|
|
}
|
|
object = Object(object);
|
|
while (++index < length) {
|
|
var source = sources[index];
|
|
if (source) {
|
|
assigner(object, source, index, customizer);
|
|
}
|
|
}
|
|
return object;
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Creates a `baseEach` or `baseEachRight` function.
|
|
*
|
|
* @private
|
|
* @param {Function} eachFunc The function to iterate over a collection.
|
|
* @param {boolean} [fromRight] Specify iterating from right to left.
|
|
* @returns {Function} Returns the new base function.
|
|
*/
|
|
function createBaseEach(eachFunc, fromRight) {
|
|
return function(collection, iteratee) {
|
|
if (collection == null) {
|
|
return collection;
|
|
}
|
|
if (!isArrayLike(collection)) {
|
|
return eachFunc(collection, iteratee);
|
|
}
|
|
var length = collection.length,
|
|
index = fromRight ? length : -1,
|
|
iterable = Object(collection);
|
|
|
|
while ((fromRight ? index-- : ++index < length)) {
|
|
if (iteratee(iterable[index], index, iterable) === false) {
|
|
break;
|
|
}
|
|
}
|
|
return collection;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a base function for methods like `_.forIn` and `_.forOwn`.
|
|
*
|
|
* @private
|
|
* @param {boolean} [fromRight] Specify iterating from right to left.
|
|
* @returns {Function} Returns the new base function.
|
|
*/
|
|
function createBaseFor(fromRight) {
|
|
return function(object, iteratee, keysFunc) {
|
|
var index = -1,
|
|
iterable = Object(object),
|
|
props = keysFunc(object),
|
|
length = props.length;
|
|
|
|
while (length--) {
|
|
var key = props[fromRight ? length : ++index];
|
|
if (iteratee(iterable[key], key, iterable) === false) {
|
|
break;
|
|
}
|
|
}
|
|
return object;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that produces an instance of `Ctor` regardless of
|
|
* whether it was invoked as part of a `new` expression or by `call` or `apply`.
|
|
*
|
|
* @private
|
|
* @param {Function} Ctor The constructor to wrap.
|
|
* @returns {Function} Returns the new wrapped function.
|
|
*/
|
|
function createCtor(Ctor) {
|
|
return function() {
|
|
// Use a `switch` statement to work with class constructors. See
|
|
// http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
|
|
// for more details.
|
|
var args = arguments;
|
|
switch (args.length) {
|
|
case 0: return new Ctor;
|
|
case 1: return new Ctor(args[0]);
|
|
case 2: return new Ctor(args[0], args[1]);
|
|
case 3: return new Ctor(args[0], args[1], args[2]);
|
|
case 4: return new Ctor(args[0], args[1], args[2], args[3]);
|
|
case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
|
|
case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
|
|
case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
|
|
}
|
|
var thisBinding = baseCreate(Ctor.prototype),
|
|
result = Ctor.apply(thisBinding, args);
|
|
|
|
// Mimic the constructor's `return` behavior.
|
|
// See https://es5.github.io/#x13.2.2 for more details.
|
|
return isObject(result) ? result : thisBinding;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a `_.find` or `_.findLast` function.
|
|
*
|
|
* @private
|
|
* @param {Function} findIndexFunc The function to find the collection index.
|
|
* @returns {Function} Returns the new find function.
|
|
*/
|
|
function createFind(findIndexFunc) {
|
|
return function(collection, predicate, fromIndex) {
|
|
var iterable = Object(collection);
|
|
if (!isArrayLike(collection)) {
|
|
var iteratee = getIteratee(predicate, 3);
|
|
collection = keys(collection);
|
|
predicate = function(key) { return iteratee(iterable[key], key, iterable); };
|
|
}
|
|
var index = findIndexFunc(collection, predicate, fromIndex);
|
|
return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that wraps `func` to invoke it with optional `this`
|
|
* binding of `thisArg`, partial application, and currying.
|
|
*
|
|
* @private
|
|
* @param {Function|string} func The function or method name to wrap.
|
|
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @param {Array} [partials] The arguments to prepend to those provided to
|
|
* the new function.
|
|
* @param {Array} [holders] The `partials` placeholder indexes.
|
|
* @param {Array} [partialsRight] The arguments to append to those provided
|
|
* to the new function.
|
|
* @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
|
|
* @param {Array} [argPos] The argument positions of the new function.
|
|
* @param {number} [ary] The arity cap of `func`.
|
|
* @param {number} [arity] The arity of `func`.
|
|
* @returns {Function} Returns the new wrapped function.
|
|
*/
|
|
function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
|
|
var isAry = bitmask & WRAP_ARY_FLAG,
|
|
isBind = bitmask & WRAP_BIND_FLAG,
|
|
isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
|
|
isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
|
|
isFlip = bitmask & WRAP_FLIP_FLAG,
|
|
Ctor = isBindKey ? undefined : createCtor(func);
|
|
|
|
function wrapper() {
|
|
var length = arguments.length,
|
|
args = Array(length),
|
|
index = length;
|
|
|
|
while (index--) {
|
|
args[index] = arguments[index];
|
|
}
|
|
if (isCurried) {
|
|
var placeholder = getHolder(wrapper),
|
|
holdersCount = countHolders(args, placeholder);
|
|
}
|
|
if (partials) {
|
|
args = composeArgs(args, partials, holders, isCurried);
|
|
}
|
|
if (partialsRight) {
|
|
args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
|
|
}
|
|
length -= holdersCount;
|
|
if (isCurried && length < arity) {
|
|
var newHolders = replaceHolders(args, placeholder);
|
|
return createRecurry(
|
|
func, bitmask, createHybrid, wrapper.placeholder, thisArg,
|
|
args, newHolders, argPos, ary, arity - length
|
|
);
|
|
}
|
|
var thisBinding = isBind ? thisArg : this,
|
|
fn = isBindKey ? thisBinding[func] : func;
|
|
|
|
length = args.length;
|
|
if (argPos) {
|
|
args = reorder(args, argPos);
|
|
} else if (isFlip && length > 1) {
|
|
args.reverse();
|
|
}
|
|
if (isAry && ary < length) {
|
|
args.length = ary;
|
|
}
|
|
if (this && this !== root && this instanceof wrapper) {
|
|
fn = Ctor || createCtor(fn);
|
|
}
|
|
return fn.apply(thisBinding, args);
|
|
}
|
|
return wrapper;
|
|
}
|
|
|
|
/**
|
|
* Creates a `_.range` or `_.rangeRight` function.
|
|
*
|
|
* @private
|
|
* @param {boolean} [fromRight] Specify iterating from right to left.
|
|
* @returns {Function} Returns the new range function.
|
|
*/
|
|
function createRange(fromRight) {
|
|
return function(start, end, step) {
|
|
if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
|
|
end = step = undefined;
|
|
}
|
|
// Ensure the sign of `-0` is preserved.
|
|
start = toFinite(start);
|
|
if (end === undefined) {
|
|
end = start;
|
|
start = 0;
|
|
} else {
|
|
end = toFinite(end);
|
|
}
|
|
step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
|
|
return baseRange(start, end, step, fromRight);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that wraps `func` to continue currying.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to wrap.
|
|
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
|
|
* @param {Function} wrapFunc The function to create the `func` wrapper.
|
|
* @param {*} placeholder The placeholder value.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @param {Array} [partials] The arguments to prepend to those provided to
|
|
* the new function.
|
|
* @param {Array} [holders] The `partials` placeholder indexes.
|
|
* @param {Array} [argPos] The argument positions of the new function.
|
|
* @param {number} [ary] The arity cap of `func`.
|
|
* @param {number} [arity] The arity of `func`.
|
|
* @returns {Function} Returns the new wrapped function.
|
|
*/
|
|
function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
|
|
var isCurry = bitmask & WRAP_CURRY_FLAG,
|
|
newHolders = isCurry ? holders : undefined,
|
|
newHoldersRight = isCurry ? undefined : holders,
|
|
newPartials = isCurry ? partials : undefined,
|
|
newPartialsRight = isCurry ? undefined : partials;
|
|
|
|
bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
|
|
bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
|
|
|
|
if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
|
|
bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
|
|
}
|
|
var newData = [
|
|
func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
|
|
newHoldersRight, argPos, ary, arity
|
|
];
|
|
|
|
var result = wrapFunc.apply(undefined, newData);
|
|
if (isLaziable(func)) {
|
|
setData(result, newData);
|
|
}
|
|
result.placeholder = placeholder;
|
|
return setWrapToString(result, func, bitmask);
|
|
}
|
|
|
|
/**
|
|
* Creates a set object of `values`.
|
|
*
|
|
* @private
|
|
* @param {Array} values The values to add to the set.
|
|
* @returns {Object} Returns the new set.
|
|
*/
|
|
var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
|
|
return new Set(values);
|
|
};
|
|
|
|
/**
|
|
* Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
|
|
* objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to inspect.
|
|
* @param {string} key The key of the property to inspect.
|
|
* @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
|
|
*/
|
|
function customOmitClone(value) {
|
|
return isPlainObject(value) ? undefined : value;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseIsEqualDeep` for arrays with support for
|
|
* partial deep comparisons.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to compare.
|
|
* @param {Array} other The other array to compare.
|
|
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
|
|
* @param {Function} customizer The function to customize comparisons.
|
|
* @param {Function} equalFunc The function to determine equivalents of values.
|
|
* @param {Object} stack Tracks traversed `array` and `other` objects.
|
|
* @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
|
|
*/
|
|
function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
|
|
var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
|
|
arrLength = array.length,
|
|
othLength = other.length;
|
|
|
|
if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
|
|
return false;
|
|
}
|
|
// Assume cyclic values are equal.
|
|
var stacked = stack.get(array);
|
|
if (stacked && stack.get(other)) {
|
|
return stacked == other;
|
|
}
|
|
var index = -1,
|
|
result = true,
|
|
seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
|
|
|
|
stack.set(array, other);
|
|
stack.set(other, array);
|
|
|
|
// Ignore non-index properties.
|
|
while (++index < arrLength) {
|
|
var arrValue = array[index],
|
|
othValue = other[index];
|
|
|
|
if (customizer) {
|
|
var compared = isPartial
|
|
? customizer(othValue, arrValue, index, other, array, stack)
|
|
: customizer(arrValue, othValue, index, array, other, stack);
|
|
}
|
|
if (compared !== undefined) {
|
|
if (compared) {
|
|
continue;
|
|
}
|
|
result = false;
|
|
break;
|
|
}
|
|
// Recursively compare arrays (susceptible to call stack limits).
|
|
if (seen) {
|
|
if (!arraySome(other, function(othValue, othIndex) {
|
|
if (!cacheHas(seen, othIndex) &&
|
|
(arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
|
|
return seen.push(othIndex);
|
|
}
|
|
})) {
|
|
result = false;
|
|
break;
|
|
}
|
|
} else if (!(
|
|
arrValue === othValue ||
|
|
equalFunc(arrValue, othValue, bitmask, customizer, stack)
|
|
)) {
|
|
result = false;
|
|
break;
|
|
}
|
|
}
|
|
stack['delete'](array);
|
|
stack['delete'](other);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseIsEqualDeep` for comparing objects of
|
|
* the same `toStringTag`.
|
|
*
|
|
* **Note:** This function only supports comparing values with tags of
|
|
* `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare.
|
|
* @param {Object} other The other object to compare.
|
|
* @param {string} tag The `toStringTag` of the objects to compare.
|
|
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
|
|
* @param {Function} customizer The function to customize comparisons.
|
|
* @param {Function} equalFunc The function to determine equivalents of values.
|
|
* @param {Object} stack Tracks traversed `object` and `other` objects.
|
|
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
|
|
*/
|
|
function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
|
|
switch (tag) {
|
|
case dataViewTag:
|
|
if ((object.byteLength != other.byteLength) ||
|
|
(object.byteOffset != other.byteOffset)) {
|
|
return false;
|
|
}
|
|
object = object.buffer;
|
|
other = other.buffer;
|
|
|
|
case arrayBufferTag:
|
|
if ((object.byteLength != other.byteLength) ||
|
|
!equalFunc(new Uint8Array(object), new Uint8Array(other))) {
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case boolTag:
|
|
case dateTag:
|
|
case numberTag:
|
|
// Coerce booleans to `1` or `0` and dates to milliseconds.
|
|
// Invalid dates are coerced to `NaN`.
|
|
return eq(+object, +other);
|
|
|
|
case errorTag:
|
|
return object.name == other.name && object.message == other.message;
|
|
|
|
case regexpTag:
|
|
case stringTag:
|
|
// Coerce regexes to strings and treat strings, primitives and objects,
|
|
// as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
|
|
// for more details.
|
|
return object == (other + '');
|
|
|
|
case mapTag:
|
|
var convert = mapToArray;
|
|
|
|
case setTag:
|
|
var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
|
|
convert || (convert = setToArray);
|
|
|
|
if (object.size != other.size && !isPartial) {
|
|
return false;
|
|
}
|
|
// Assume cyclic values are equal.
|
|
var stacked = stack.get(object);
|
|
if (stacked) {
|
|
return stacked == other;
|
|
}
|
|
bitmask |= COMPARE_UNORDERED_FLAG;
|
|
|
|
// Recursively compare objects (susceptible to call stack limits).
|
|
stack.set(object, other);
|
|
var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
|
|
stack['delete'](object);
|
|
return result;
|
|
|
|
case symbolTag:
|
|
if (symbolValueOf) {
|
|
return symbolValueOf.call(object) == symbolValueOf.call(other);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseIsEqualDeep` for objects with support for
|
|
* partial deep comparisons.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to compare.
|
|
* @param {Object} other The other object to compare.
|
|
* @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
|
|
* @param {Function} customizer The function to customize comparisons.
|
|
* @param {Function} equalFunc The function to determine equivalents of values.
|
|
* @param {Object} stack Tracks traversed `object` and `other` objects.
|
|
* @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
|
|
*/
|
|
function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
|
|
var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
|
|
objProps = getAllKeys(object),
|
|
objLength = objProps.length,
|
|
othProps = getAllKeys(other),
|
|
othLength = othProps.length;
|
|
|
|
if (objLength != othLength && !isPartial) {
|
|
return false;
|
|
}
|
|
var index = objLength;
|
|
while (index--) {
|
|
var key = objProps[index];
|
|
if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
|
|
return false;
|
|
}
|
|
}
|
|
// Assume cyclic values are equal.
|
|
var stacked = stack.get(object);
|
|
if (stacked && stack.get(other)) {
|
|
return stacked == other;
|
|
}
|
|
var result = true;
|
|
stack.set(object, other);
|
|
stack.set(other, object);
|
|
|
|
var skipCtor = isPartial;
|
|
while (++index < objLength) {
|
|
key = objProps[index];
|
|
var objValue = object[key],
|
|
othValue = other[key];
|
|
|
|
if (customizer) {
|
|
var compared = isPartial
|
|
? customizer(othValue, objValue, key, other, object, stack)
|
|
: customizer(objValue, othValue, key, object, other, stack);
|
|
}
|
|
// Recursively compare objects (susceptible to call stack limits).
|
|
if (!(compared === undefined
|
|
? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
|
|
: compared
|
|
)) {
|
|
result = false;
|
|
break;
|
|
}
|
|
skipCtor || (skipCtor = key == 'constructor');
|
|
}
|
|
if (result && !skipCtor) {
|
|
var objCtor = object.constructor,
|
|
othCtor = other.constructor;
|
|
|
|
// Non `Object` object instances with different constructors are not equal.
|
|
if (objCtor != othCtor &&
|
|
('constructor' in object && 'constructor' in other) &&
|
|
!(typeof objCtor == 'function' && objCtor instanceof objCtor &&
|
|
typeof othCtor == 'function' && othCtor instanceof othCtor)) {
|
|
result = false;
|
|
}
|
|
}
|
|
stack['delete'](object);
|
|
stack['delete'](other);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseRest` which flattens the rest array.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to apply a rest parameter to.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function flatRest(func) {
|
|
return setToString(overRest(func, undefined, flatten), func + '');
|
|
}
|
|
|
|
/**
|
|
* Creates an array of own enumerable property names and symbols of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names and symbols.
|
|
*/
|
|
function getAllKeys(object) {
|
|
return baseGetAllKeys(object, keys, getSymbols);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of own and inherited enumerable property names and
|
|
* symbols of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names and symbols.
|
|
*/
|
|
function getAllKeysIn(object) {
|
|
return baseGetAllKeys(object, keysIn, getSymbolsIn);
|
|
}
|
|
|
|
/**
|
|
* Gets metadata for `func`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to query.
|
|
* @returns {*} Returns the metadata for `func`.
|
|
*/
|
|
var getData = !metaMap ? noop : function(func) {
|
|
return metaMap.get(func);
|
|
};
|
|
|
|
/**
|
|
* Gets the name of `func`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to query.
|
|
* @returns {string} Returns the function name.
|
|
*/
|
|
function getFuncName(func) {
|
|
var result = (func.name + ''),
|
|
array = realNames[result],
|
|
length = hasOwnProperty.call(realNames, result) ? array.length : 0;
|
|
|
|
while (length--) {
|
|
var data = array[length],
|
|
otherFunc = data.func;
|
|
if (otherFunc == null || otherFunc == func) {
|
|
return data.name;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the argument placeholder value for `func`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to inspect.
|
|
* @returns {*} Returns the placeholder value.
|
|
*/
|
|
function getHolder(func) {
|
|
var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
|
|
return object.placeholder;
|
|
}
|
|
|
|
/**
|
|
* Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
|
|
* this function returns the custom method, otherwise it returns `baseIteratee`.
|
|
* If arguments are provided, the chosen function is invoked with them and
|
|
* its result is returned.
|
|
*
|
|
* @private
|
|
* @param {*} [value] The value to convert to an iteratee.
|
|
* @param {number} [arity] The arity of the created iteratee.
|
|
* @returns {Function} Returns the chosen function or its result.
|
|
*/
|
|
function getIteratee() {
|
|
var result = lodash.iteratee || iteratee;
|
|
result = result === iteratee ? baseIteratee : result;
|
|
return arguments.length ? result(arguments[0], arguments[1]) : result;
|
|
}
|
|
|
|
/**
|
|
* Gets the data for `map`.
|
|
*
|
|
* @private
|
|
* @param {Object} map The map to query.
|
|
* @param {string} key The reference key.
|
|
* @returns {*} Returns the map data.
|
|
*/
|
|
function getMapData(map, key) {
|
|
var data = map.__data__;
|
|
return isKeyable(key)
|
|
? data[typeof key == 'string' ? 'string' : 'hash']
|
|
: data.map;
|
|
}
|
|
|
|
/**
|
|
* Gets the property names, values, and compare flags of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the match data of `object`.
|
|
*/
|
|
function getMatchData(object) {
|
|
var result = keys(object),
|
|
length = result.length;
|
|
|
|
while (length--) {
|
|
var key = result[length],
|
|
value = object[key];
|
|
|
|
result[length] = [key, value, isStrictComparable(value)];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the native function at `key` of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {string} key The key of the method to get.
|
|
* @returns {*} Returns the function if it's native, else `undefined`.
|
|
*/
|
|
function getNative(object, key) {
|
|
var value = getValue(object, key);
|
|
return baseIsNative(value) ? value : undefined;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to query.
|
|
* @returns {string} Returns the raw `toStringTag`.
|
|
*/
|
|
function getRawTag(value) {
|
|
var isOwn = hasOwnProperty.call(value, symToStringTag),
|
|
tag = value[symToStringTag];
|
|
|
|
try {
|
|
value[symToStringTag] = undefined;
|
|
var unmasked = true;
|
|
} catch (e) {}
|
|
|
|
var result = nativeObjectToString.call(value);
|
|
if (unmasked) {
|
|
if (isOwn) {
|
|
value[symToStringTag] = tag;
|
|
} else {
|
|
delete value[symToStringTag];
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of the own enumerable symbols of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of symbols.
|
|
*/
|
|
var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
|
|
if (object == null) {
|
|
return [];
|
|
}
|
|
object = Object(object);
|
|
return arrayFilter(nativeGetSymbols(object), function(symbol) {
|
|
return propertyIsEnumerable.call(object, symbol);
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Creates an array of the own and inherited enumerable symbols of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of symbols.
|
|
*/
|
|
var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
|
|
var result = [];
|
|
while (object) {
|
|
arrayPush(result, getSymbols(object));
|
|
object = getPrototype(object);
|
|
}
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Gets the `toStringTag` of `value`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to query.
|
|
* @returns {string} Returns the `toStringTag`.
|
|
*/
|
|
var getTag = baseGetTag;
|
|
|
|
// Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
|
|
if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
|
|
(Map && getTag(new Map) != mapTag) ||
|
|
(Promise && getTag(Promise.resolve()) != promiseTag) ||
|
|
(Set && getTag(new Set) != setTag) ||
|
|
(WeakMap && getTag(new WeakMap) != weakMapTag)) {
|
|
getTag = function(value) {
|
|
var result = baseGetTag(value),
|
|
Ctor = result == objectTag ? value.constructor : undefined,
|
|
ctorString = Ctor ? toSource(Ctor) : '';
|
|
|
|
if (ctorString) {
|
|
switch (ctorString) {
|
|
case dataViewCtorString: return dataViewTag;
|
|
case mapCtorString: return mapTag;
|
|
case promiseCtorString: return promiseTag;
|
|
case setCtorString: return setTag;
|
|
case weakMapCtorString: return weakMapTag;
|
|
}
|
|
}
|
|
return result;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Gets the view, applying any `transforms` to the `start` and `end` positions.
|
|
*
|
|
* @private
|
|
* @param {number} start The start of the view.
|
|
* @param {number} end The end of the view.
|
|
* @param {Array} transforms The transformations to apply to the view.
|
|
* @returns {Object} Returns an object containing the `start` and `end`
|
|
* positions of the view.
|
|
*/
|
|
function getView(start, end, transforms) {
|
|
var index = -1,
|
|
length = transforms.length;
|
|
|
|
while (++index < length) {
|
|
var data = transforms[index],
|
|
size = data.size;
|
|
|
|
switch (data.type) {
|
|
case 'drop': start += size; break;
|
|
case 'dropRight': end -= size; break;
|
|
case 'take': end = nativeMin(end, start + size); break;
|
|
case 'takeRight': start = nativeMax(start, end - size); break;
|
|
}
|
|
}
|
|
return { 'start': start, 'end': end };
|
|
}
|
|
|
|
/**
|
|
* Extracts wrapper details from the `source` body comment.
|
|
*
|
|
* @private
|
|
* @param {string} source The source to inspect.
|
|
* @returns {Array} Returns the wrapper details.
|
|
*/
|
|
function getWrapDetails(source) {
|
|
var match = source.match(reWrapDetails);
|
|
return match ? match[1].split(reSplitDetails) : [];
|
|
}
|
|
|
|
/**
|
|
* Checks if `path` exists on `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path to check.
|
|
* @param {Function} hasFunc The function to check properties.
|
|
* @returns {boolean} Returns `true` if `path` exists, else `false`.
|
|
*/
|
|
function hasPath(object, path, hasFunc) {
|
|
path = castPath(path, object);
|
|
|
|
var index = -1,
|
|
length = path.length,
|
|
result = false;
|
|
|
|
while (++index < length) {
|
|
var key = toKey(path[index]);
|
|
if (!(result = object != null && hasFunc(object, key))) {
|
|
break;
|
|
}
|
|
object = object[key];
|
|
}
|
|
if (result || ++index != length) {
|
|
return result;
|
|
}
|
|
length = object == null ? 0 : object.length;
|
|
return !!length && isLength(length) && isIndex(key, length) &&
|
|
(isArray(object) || isArguments(object));
|
|
}
|
|
|
|
/**
|
|
* Initializes an array clone.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to clone.
|
|
* @returns {Array} Returns the initialized clone.
|
|
*/
|
|
function initCloneArray(array) {
|
|
var length = array.length,
|
|
result = new array.constructor(length);
|
|
|
|
// Add properties assigned by `RegExp#exec`.
|
|
if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
|
|
result.index = array.index;
|
|
result.input = array.input;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Initializes an object clone.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to clone.
|
|
* @returns {Object} Returns the initialized clone.
|
|
*/
|
|
function initCloneObject(object) {
|
|
return (typeof object.constructor == 'function' && !isPrototype(object))
|
|
? baseCreate(getPrototype(object))
|
|
: {};
|
|
}
|
|
|
|
/**
|
|
* Initializes an object clone based on its `toStringTag`.
|
|
*
|
|
* **Note:** This function only supports cloning values with tags of
|
|
* `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to clone.
|
|
* @param {string} tag The `toStringTag` of the object to clone.
|
|
* @param {boolean} [isDeep] Specify a deep clone.
|
|
* @returns {Object} Returns the initialized clone.
|
|
*/
|
|
function initCloneByTag(object, tag, isDeep) {
|
|
var Ctor = object.constructor;
|
|
switch (tag) {
|
|
case arrayBufferTag:
|
|
return cloneArrayBuffer(object);
|
|
|
|
case boolTag:
|
|
case dateTag:
|
|
return new Ctor(+object);
|
|
|
|
case dataViewTag:
|
|
return cloneDataView(object, isDeep);
|
|
|
|
case float32Tag: case float64Tag:
|
|
case int8Tag: case int16Tag: case int32Tag:
|
|
case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
|
|
return cloneTypedArray(object, isDeep);
|
|
|
|
case mapTag:
|
|
return new Ctor;
|
|
|
|
case numberTag:
|
|
case stringTag:
|
|
return new Ctor(object);
|
|
|
|
case regexpTag:
|
|
return cloneRegExp(object);
|
|
|
|
case setTag:
|
|
return new Ctor;
|
|
|
|
case symbolTag:
|
|
return cloneSymbol(object);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Inserts wrapper `details` in a comment at the top of the `source` body.
|
|
*
|
|
* @private
|
|
* @param {string} source The source to modify.
|
|
* @returns {Array} details The details to insert.
|
|
* @returns {string} Returns the modified source.
|
|
*/
|
|
function insertWrapDetails(source, details) {
|
|
var length = details.length;
|
|
if (!length) {
|
|
return source;
|
|
}
|
|
var lastIndex = length - 1;
|
|
details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
|
|
details = details.join(length > 2 ? ', ' : ' ');
|
|
return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a flattenable `arguments` object or array.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
|
|
*/
|
|
function isFlattenable(value) {
|
|
return isArray(value) || isArguments(value) ||
|
|
!!(spreadableSymbol && value && value[spreadableSymbol]);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a valid array-like index.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
|
|
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
|
|
*/
|
|
function isIndex(value, length) {
|
|
var type = typeof value;
|
|
length = length == null ? MAX_SAFE_INTEGER : length;
|
|
|
|
return !!length &&
|
|
(type == 'number' ||
|
|
(type != 'symbol' && reIsUint.test(value))) &&
|
|
(value > -1 && value % 1 == 0 && value < length);
|
|
}
|
|
|
|
/**
|
|
* Checks if the given arguments are from an iteratee call.
|
|
*
|
|
* @private
|
|
* @param {*} value The potential iteratee value argument.
|
|
* @param {*} index The potential iteratee index or key argument.
|
|
* @param {*} object The potential iteratee object argument.
|
|
* @returns {boolean} Returns `true` if the arguments are from an iteratee call,
|
|
* else `false`.
|
|
*/
|
|
function isIterateeCall(value, index, object) {
|
|
if (!isObject(object)) {
|
|
return false;
|
|
}
|
|
var type = typeof index;
|
|
if (type == 'number'
|
|
? (isArrayLike(object) && isIndex(index, object.length))
|
|
: (type == 'string' && index in object)
|
|
) {
|
|
return eq(object[index], value);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a property name and not a property path.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @param {Object} [object] The object to query keys on.
|
|
* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
|
|
*/
|
|
function isKey(value, object) {
|
|
if (isArray(value)) {
|
|
return false;
|
|
}
|
|
var type = typeof value;
|
|
if (type == 'number' || type == 'symbol' || type == 'boolean' ||
|
|
value == null || isSymbol(value)) {
|
|
return true;
|
|
}
|
|
return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
|
|
(object != null && value in Object(object));
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is suitable for use as unique object key.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is suitable, else `false`.
|
|
*/
|
|
function isKeyable(value) {
|
|
var type = typeof value;
|
|
return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
|
|
? (value !== '__proto__')
|
|
: (value === null);
|
|
}
|
|
|
|
/**
|
|
* Checks if `func` has a lazy counterpart.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to check.
|
|
* @returns {boolean} Returns `true` if `func` has a lazy counterpart,
|
|
* else `false`.
|
|
*/
|
|
function isLaziable(func) {
|
|
var funcName = getFuncName(func),
|
|
other = lodash[funcName];
|
|
|
|
if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
|
|
return false;
|
|
}
|
|
if (func === other) {
|
|
return true;
|
|
}
|
|
var data = getData(other);
|
|
return !!data && func === data[0];
|
|
}
|
|
|
|
/**
|
|
* Checks if `func` has its source masked.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to check.
|
|
* @returns {boolean} Returns `true` if `func` is masked, else `false`.
|
|
*/
|
|
function isMasked(func) {
|
|
return !!maskSrcKey && (maskSrcKey in func);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is likely a prototype object.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
|
|
*/
|
|
function isPrototype(value) {
|
|
var Ctor = value && value.constructor,
|
|
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
|
|
|
|
return value === proto;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` if suitable for strict
|
|
* equality comparisons, else `false`.
|
|
*/
|
|
function isStrictComparable(value) {
|
|
return value === value && !isObject(value);
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `matchesProperty` for source values suitable
|
|
* for strict equality comparisons, i.e. `===`.
|
|
*
|
|
* @private
|
|
* @param {string} key The key of the property to get.
|
|
* @param {*} srcValue The value to match.
|
|
* @returns {Function} Returns the new spec function.
|
|
*/
|
|
function matchesStrictComparable(key, srcValue) {
|
|
return function(object) {
|
|
if (object == null) {
|
|
return false;
|
|
}
|
|
return object[key] === srcValue &&
|
|
(srcValue !== undefined || (key in Object(object)));
|
|
};
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `_.memoize` which clears the memoized function's
|
|
* cache when it exceeds `MAX_MEMOIZE_SIZE`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to have its output memoized.
|
|
* @returns {Function} Returns the new memoized function.
|
|
*/
|
|
function memoizeCapped(func) {
|
|
var result = memoize(func, function(key) {
|
|
if (cache.size === MAX_MEMOIZE_SIZE) {
|
|
cache.clear();
|
|
}
|
|
return key;
|
|
});
|
|
|
|
var cache = result.cache;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This function is like
|
|
* [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
|
|
* except that it includes inherited enumerable properties.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
*/
|
|
function nativeKeysIn(object) {
|
|
var result = [];
|
|
if (object != null) {
|
|
for (var key in Object(object)) {
|
|
result.push(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to a string using `Object.prototype.toString`.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to convert.
|
|
* @returns {string} Returns the converted string.
|
|
*/
|
|
function objectToString(value) {
|
|
return nativeObjectToString.call(value);
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `baseRest` which transforms the rest array.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to apply a rest parameter to.
|
|
* @param {number} [start=func.length-1] The start position of the rest parameter.
|
|
* @param {Function} transform The rest array transform.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function overRest(func, start, transform) {
|
|
start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
|
|
return function() {
|
|
var args = arguments,
|
|
index = -1,
|
|
length = nativeMax(args.length - start, 0),
|
|
array = Array(length);
|
|
|
|
while (++index < length) {
|
|
array[index] = args[start + index];
|
|
}
|
|
index = -1;
|
|
var otherArgs = Array(start + 1);
|
|
while (++index < start) {
|
|
otherArgs[index] = args[index];
|
|
}
|
|
otherArgs[start] = transform(array);
|
|
return apply(func, this, otherArgs);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Gets the parent value at `path` of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {Array} path The path to get the parent value of.
|
|
* @returns {*} Returns the parent value.
|
|
*/
|
|
function parent(object, path) {
|
|
return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
|
|
}
|
|
|
|
/**
|
|
* Reorder `array` according to the specified indexes where the element at
|
|
* the first index is assigned as the first element, the element at
|
|
* the second index is assigned as the second element, and so on.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to reorder.
|
|
* @param {Array} indexes The arranged array indexes.
|
|
* @returns {Array} Returns `array`.
|
|
*/
|
|
function reorder(array, indexes) {
|
|
var arrLength = array.length,
|
|
length = nativeMin(indexes.length, arrLength),
|
|
oldArray = copyArray(array);
|
|
|
|
while (length--) {
|
|
var index = indexes[length];
|
|
array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
|
|
}
|
|
return array;
|
|
}
|
|
|
|
/**
|
|
* Gets the value at `key`, unless `key` is "__proto__".
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to query.
|
|
* @param {string} key The key of the property to get.
|
|
* @returns {*} Returns the property value.
|
|
*/
|
|
function safeGet(object, key) {
|
|
if (key == '__proto__') {
|
|
return;
|
|
}
|
|
|
|
return object[key];
|
|
}
|
|
|
|
/**
|
|
* Sets metadata for `func`.
|
|
*
|
|
* **Note:** If this function becomes hot, i.e. is invoked a lot in a short
|
|
* period of time, it will trip its breaker and transition to an identity
|
|
* function to avoid garbage collection pauses in V8. See
|
|
* [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
|
|
* for more details.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to associate metadata with.
|
|
* @param {*} data The metadata.
|
|
* @returns {Function} Returns `func`.
|
|
*/
|
|
var setData = shortOut(baseSetData);
|
|
|
|
/**
|
|
* Sets the `toString` method of `func` to return `string`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to modify.
|
|
* @param {Function} string The `toString` result.
|
|
* @returns {Function} Returns `func`.
|
|
*/
|
|
var setToString = shortOut(baseSetToString);
|
|
|
|
/**
|
|
* Sets the `toString` method of `wrapper` to mimic the source of `reference`
|
|
* with wrapper details in a comment at the top of the source body.
|
|
*
|
|
* @private
|
|
* @param {Function} wrapper The function to modify.
|
|
* @param {Function} reference The reference function.
|
|
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
|
|
* @returns {Function} Returns `wrapper`.
|
|
*/
|
|
function setWrapToString(wrapper, reference, bitmask) {
|
|
var source = (reference + '');
|
|
return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
|
|
}
|
|
|
|
/**
|
|
* Creates a function that'll short out and invoke `identity` instead
|
|
* of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
|
|
* milliseconds.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to restrict.
|
|
* @returns {Function} Returns the new shortable function.
|
|
*/
|
|
function shortOut(func) {
|
|
var count = 0,
|
|
lastCalled = 0;
|
|
|
|
return function() {
|
|
var stamp = nativeNow(),
|
|
remaining = HOT_SPAN - (stamp - lastCalled);
|
|
|
|
lastCalled = stamp;
|
|
if (remaining > 0) {
|
|
if (++count >= HOT_COUNT) {
|
|
return arguments[0];
|
|
}
|
|
} else {
|
|
count = 0;
|
|
}
|
|
return func.apply(undefined, arguments);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Converts `string` to a property path array.
|
|
*
|
|
* @private
|
|
* @param {string} string The string to convert.
|
|
* @returns {Array} Returns the property path array.
|
|
*/
|
|
var stringToPath = memoizeCapped(function(string) {
|
|
var result = [];
|
|
if (string.charCodeAt(0) === 46 /* . */) {
|
|
result.push('');
|
|
}
|
|
string.replace(rePropName, function(match, number, quote, subString) {
|
|
result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
|
|
});
|
|
return result;
|
|
});
|
|
|
|
/**
|
|
* Converts `value` to a string key if it's not a string or symbol.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to inspect.
|
|
* @returns {string|symbol} Returns the key.
|
|
*/
|
|
function toKey(value) {
|
|
if (typeof value == 'string' || isSymbol(value)) {
|
|
return value;
|
|
}
|
|
var result = (value + '');
|
|
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
|
|
}
|
|
|
|
/**
|
|
* Converts `func` to its source code.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to convert.
|
|
* @returns {string} Returns the source code.
|
|
*/
|
|
function toSource(func) {
|
|
if (func != null) {
|
|
try {
|
|
return funcToString.call(func);
|
|
} catch (e) {}
|
|
try {
|
|
return (func + '');
|
|
} catch (e) {}
|
|
}
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* Updates wrapper `details` based on `bitmask` flags.
|
|
*
|
|
* @private
|
|
* @returns {Array} details The details to modify.
|
|
* @param {number} bitmask The bitmask flags. See `createWrap` for more details.
|
|
* @returns {Array} Returns `details`.
|
|
*/
|
|
function updateWrapDetails(details, bitmask) {
|
|
arrayEach(wrapFlags, function(pair) {
|
|
var value = '_.' + pair[0];
|
|
if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
|
|
details.push(value);
|
|
}
|
|
});
|
|
return details.sort();
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of `wrapper`.
|
|
*
|
|
* @private
|
|
* @param {Object} wrapper The wrapper to clone.
|
|
* @returns {Object} Returns the cloned wrapper.
|
|
*/
|
|
function wrapperClone(wrapper) {
|
|
if (wrapper instanceof LazyWrapper) {
|
|
return wrapper.clone();
|
|
}
|
|
var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
|
|
result.__actions__ = copyArray(wrapper.__actions__);
|
|
result.__index__ = wrapper.__index__;
|
|
result.__values__ = wrapper.__values__;
|
|
return result;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates an array with all falsey values removed. The values `false`, `null`,
|
|
* `0`, `""`, `undefined`, and `NaN` are falsey.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to compact.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
* @example
|
|
*
|
|
* _.compact([0, 1, false, 2, '', 3]);
|
|
* // => [1, 2, 3]
|
|
*/
|
|
function compact(array) {
|
|
var index = -1,
|
|
length = array == null ? 0 : array.length,
|
|
resIndex = 0,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
if (value) {
|
|
result[resIndex++] = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.find` except that it returns the index of the first
|
|
* element `predicate` returns truthy for instead of the element itself.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 1.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Function} [predicate=_.identity] The function invoked per iteration.
|
|
* @param {number} [fromIndex=0] The index to search from.
|
|
* @returns {number} Returns the index of the found element, else `-1`.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'active': false },
|
|
* { 'user': 'fred', 'active': false },
|
|
* { 'user': 'pebbles', 'active': true }
|
|
* ];
|
|
*
|
|
* _.findIndex(users, function(o) { return o.user == 'barney'; });
|
|
* // => 0
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.findIndex(users, { 'user': 'fred', 'active': false });
|
|
* // => 1
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.findIndex(users, ['active', false]);
|
|
* // => 0
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.findIndex(users, 'active');
|
|
* // => 2
|
|
*/
|
|
function findIndex(array, predicate, fromIndex) {
|
|
var length = array == null ? 0 : array.length;
|
|
if (!length) {
|
|
return -1;
|
|
}
|
|
var index = fromIndex == null ? 0 : toInteger(fromIndex);
|
|
if (index < 0) {
|
|
index = nativeMax(length + index, 0);
|
|
}
|
|
return baseFindIndex(array, getIteratee(predicate, 3), index);
|
|
}
|
|
|
|
/**
|
|
* Flattens `array` a single level deep.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to flatten.
|
|
* @returns {Array} Returns the new flattened array.
|
|
* @example
|
|
*
|
|
* _.flatten([1, [2, [3, [4]], 5]]);
|
|
* // => [1, 2, [3, [4]], 5]
|
|
*/
|
|
function flatten(array) {
|
|
var length = array == null ? 0 : array.length;
|
|
return length ? baseFlatten(array, 1) : [];
|
|
}
|
|
|
|
/**
|
|
* Gets the first element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @alias first
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {*} Returns the first element of `array`.
|
|
* @example
|
|
*
|
|
* _.head([1, 2, 3]);
|
|
* // => 1
|
|
*
|
|
* _.head([]);
|
|
* // => undefined
|
|
*/
|
|
function head(array) {
|
|
return (array && array.length) ? array[0] : undefined;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of unique values that are included in all given arrays
|
|
* using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* for equality comparisons. The order and references of result values are
|
|
* determined by the first array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to inspect.
|
|
* @returns {Array} Returns the new array of intersecting values.
|
|
* @example
|
|
*
|
|
* _.intersection([2, 1], [2, 3]);
|
|
* // => [2]
|
|
*/
|
|
var intersection = baseRest(function(arrays) {
|
|
var mapped = arrayMap(arrays, castArrayLikeObject);
|
|
return (mapped.length && mapped[0] === arrays[0])
|
|
? baseIntersection(mapped)
|
|
: [];
|
|
});
|
|
|
|
/**
|
|
* Gets the last element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {*} Returns the last element of `array`.
|
|
* @example
|
|
*
|
|
* _.last([1, 2, 3]);
|
|
* // => 3
|
|
*/
|
|
function last(array) {
|
|
var length = array == null ? 0 : array.length;
|
|
return length ? array[length - 1] : undefined;
|
|
}
|
|
|
|
/**
|
|
* Reverses `array` so that the first element becomes the last, the second
|
|
* element becomes the second to last, and so on.
|
|
*
|
|
* **Note:** This method mutates `array` and is based on
|
|
* [`Array#reverse`](https://mdn.io/Array/reverse).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Array
|
|
* @param {Array} array The array to modify.
|
|
* @returns {Array} Returns `array`.
|
|
* @example
|
|
*
|
|
* var array = [1, 2, 3];
|
|
*
|
|
* _.reverse(array);
|
|
* // => [3, 2, 1]
|
|
*
|
|
* console.log(array);
|
|
* // => [3, 2, 1]
|
|
*/
|
|
function reverse(array) {
|
|
return array == null ? array : nativeReverse.call(array);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of unique values, in order, from all given arrays using
|
|
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* for equality comparisons.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to inspect.
|
|
* @returns {Array} Returns the new array of combined values.
|
|
* @example
|
|
*
|
|
* _.union([2], [1, 2]);
|
|
* // => [2, 1]
|
|
*/
|
|
var union = baseRest(function(arrays) {
|
|
return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
|
|
});
|
|
|
|
/**
|
|
* Creates a duplicate-free version of an array, using
|
|
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* for equality comparisons, in which only the first occurrence of each element
|
|
* is kept. The order of result values is determined by the order they occur
|
|
* in the array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @returns {Array} Returns the new duplicate free array.
|
|
* @example
|
|
*
|
|
* _.uniq([2, 1, 2]);
|
|
* // => [2, 1]
|
|
*/
|
|
function uniq(array) {
|
|
return (array && array.length) ? baseUniq(array) : [];
|
|
}
|
|
|
|
/**
|
|
* Creates an array excluding all given values using
|
|
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* for equality comparisons.
|
|
*
|
|
* **Note:** Unlike `_.pull`, this method returns a new array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @param {...*} [values] The values to exclude.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
* @see _.difference, _.xor
|
|
* @example
|
|
*
|
|
* _.without([2, 1, 2, 3], 1, 2);
|
|
* // => [3]
|
|
*/
|
|
var without = baseRest(function(array, values) {
|
|
return isArrayLikeObject(array)
|
|
? baseDifference(array, values)
|
|
: [];
|
|
});
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a `lodash` wrapper instance that wraps `value` with explicit method
|
|
* chain sequences enabled. The result of such sequences must be unwrapped
|
|
* with `_#value`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 1.3.0
|
|
* @category Seq
|
|
* @param {*} value The value to wrap.
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'pebbles', 'age': 1 }
|
|
* ];
|
|
*
|
|
* var youngest = _
|
|
* .chain(users)
|
|
* .sortBy('age')
|
|
* .map(function(o) {
|
|
* return o.user + ' is ' + o.age;
|
|
* })
|
|
* .head()
|
|
* .value();
|
|
* // => 'pebbles is 1'
|
|
*/
|
|
function chain(value) {
|
|
var result = lodash(value);
|
|
result.__chain__ = true;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method invokes `interceptor` and returns `value`. The interceptor
|
|
* is invoked with one argument; (value). The purpose of this method is to
|
|
* "tap into" a method chain sequence in order to modify intermediate results.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Seq
|
|
* @param {*} value The value to provide to `interceptor`.
|
|
* @param {Function} interceptor The function to invoke.
|
|
* @returns {*} Returns `value`.
|
|
* @example
|
|
*
|
|
* _([1, 2, 3])
|
|
* .tap(function(array) {
|
|
* // Mutate input array.
|
|
* array.pop();
|
|
* })
|
|
* .reverse()
|
|
* .value();
|
|
* // => [2, 1]
|
|
*/
|
|
function tap(value, interceptor) {
|
|
interceptor(value);
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.tap` except that it returns the result of `interceptor`.
|
|
* The purpose of this method is to "pass thru" values replacing intermediate
|
|
* results in a method chain sequence.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Seq
|
|
* @param {*} value The value to provide to `interceptor`.
|
|
* @param {Function} interceptor The function to invoke.
|
|
* @returns {*} Returns the result of `interceptor`.
|
|
* @example
|
|
*
|
|
* _(' abc ')
|
|
* .chain()
|
|
* .trim()
|
|
* .thru(function(value) {
|
|
* return [value];
|
|
* })
|
|
* .value();
|
|
* // => ['abc']
|
|
*/
|
|
function thru(value, interceptor) {
|
|
return interceptor(value);
|
|
}
|
|
|
|
/**
|
|
* This method is the wrapper version of `_.at`.
|
|
*
|
|
* @name at
|
|
* @memberOf _
|
|
* @since 1.0.0
|
|
* @category Seq
|
|
* @param {...(string|string[])} [paths] The property paths to pick.
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
|
|
*
|
|
* _(object).at(['a[0].b.c', 'a[1]']).value();
|
|
* // => [3, 4]
|
|
*/
|
|
var wrapperAt = flatRest(function(paths) {
|
|
var length = paths.length,
|
|
start = length ? paths[0] : 0,
|
|
value = this.__wrapped__,
|
|
interceptor = function(object) { return baseAt(object, paths); };
|
|
|
|
if (length > 1 || this.__actions__.length ||
|
|
!(value instanceof LazyWrapper) || !isIndex(start)) {
|
|
return this.thru(interceptor);
|
|
}
|
|
value = value.slice(start, +start + (length ? 1 : 0));
|
|
value.__actions__.push({
|
|
'func': thru,
|
|
'args': [interceptor],
|
|
'thisArg': undefined
|
|
});
|
|
return new LodashWrapper(value, this.__chain__).thru(function(array) {
|
|
if (length && !array.length) {
|
|
array.push(undefined);
|
|
}
|
|
return array;
|
|
});
|
|
});
|
|
|
|
/**
|
|
* Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
|
|
*
|
|
* @name chain
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Seq
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* // A sequence without explicit chaining.
|
|
* _(users).head();
|
|
* // => { 'user': 'barney', 'age': 36 }
|
|
*
|
|
* // A sequence with explicit chaining.
|
|
* _(users)
|
|
* .chain()
|
|
* .head()
|
|
* .pick('user')
|
|
* .value();
|
|
* // => { 'user': 'barney' }
|
|
*/
|
|
function wrapperChain() {
|
|
return chain(this);
|
|
}
|
|
|
|
/**
|
|
* Executes the chain sequence and returns the wrapped result.
|
|
*
|
|
* @name commit
|
|
* @memberOf _
|
|
* @since 3.2.0
|
|
* @category Seq
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* var array = [1, 2];
|
|
* var wrapped = _(array).push(3);
|
|
*
|
|
* console.log(array);
|
|
* // => [1, 2]
|
|
*
|
|
* wrapped = wrapped.commit();
|
|
* console.log(array);
|
|
* // => [1, 2, 3]
|
|
*
|
|
* wrapped.last();
|
|
* // => 3
|
|
*
|
|
* console.log(array);
|
|
* // => [1, 2, 3]
|
|
*/
|
|
function wrapperCommit() {
|
|
return new LodashWrapper(this.value(), this.__chain__);
|
|
}
|
|
|
|
/**
|
|
* Gets the next value on a wrapped object following the
|
|
* [iterator protocol](https://mdn.io/iteration_protocols#iterator).
|
|
*
|
|
* @name next
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Seq
|
|
* @returns {Object} Returns the next iterator value.
|
|
* @example
|
|
*
|
|
* var wrapped = _([1, 2]);
|
|
*
|
|
* wrapped.next();
|
|
* // => { 'done': false, 'value': 1 }
|
|
*
|
|
* wrapped.next();
|
|
* // => { 'done': false, 'value': 2 }
|
|
*
|
|
* wrapped.next();
|
|
* // => { 'done': true, 'value': undefined }
|
|
*/
|
|
function wrapperNext() {
|
|
if (this.__values__ === undefined) {
|
|
this.__values__ = toArray(this.value());
|
|
}
|
|
var done = this.__index__ >= this.__values__.length,
|
|
value = done ? undefined : this.__values__[this.__index__++];
|
|
|
|
return { 'done': done, 'value': value };
|
|
}
|
|
|
|
/**
|
|
* Enables the wrapper to be iterable.
|
|
*
|
|
* @name Symbol.iterator
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Seq
|
|
* @returns {Object} Returns the wrapper object.
|
|
* @example
|
|
*
|
|
* var wrapped = _([1, 2]);
|
|
*
|
|
* wrapped[Symbol.iterator]() === wrapped;
|
|
* // => true
|
|
*
|
|
* Array.from(wrapped);
|
|
* // => [1, 2]
|
|
*/
|
|
function wrapperToIterator() {
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Creates a clone of the chain sequence planting `value` as the wrapped value.
|
|
*
|
|
* @name plant
|
|
* @memberOf _
|
|
* @since 3.2.0
|
|
* @category Seq
|
|
* @param {*} value The value to plant.
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* function square(n) {
|
|
* return n * n;
|
|
* }
|
|
*
|
|
* var wrapped = _([1, 2]).map(square);
|
|
* var other = wrapped.plant([3, 4]);
|
|
*
|
|
* other.value();
|
|
* // => [9, 16]
|
|
*
|
|
* wrapped.value();
|
|
* // => [1, 4]
|
|
*/
|
|
function wrapperPlant(value) {
|
|
var result,
|
|
parent = this;
|
|
|
|
while (parent instanceof baseLodash) {
|
|
var clone = wrapperClone(parent);
|
|
clone.__index__ = 0;
|
|
clone.__values__ = undefined;
|
|
if (result) {
|
|
previous.__wrapped__ = clone;
|
|
} else {
|
|
result = clone;
|
|
}
|
|
var previous = clone;
|
|
parent = parent.__wrapped__;
|
|
}
|
|
previous.__wrapped__ = value;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method is the wrapper version of `_.reverse`.
|
|
*
|
|
* **Note:** This method mutates the wrapped array.
|
|
*
|
|
* @name reverse
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Seq
|
|
* @returns {Object} Returns the new `lodash` wrapper instance.
|
|
* @example
|
|
*
|
|
* var array = [1, 2, 3];
|
|
*
|
|
* _(array).reverse().value()
|
|
* // => [3, 2, 1]
|
|
*
|
|
* console.log(array);
|
|
* // => [3, 2, 1]
|
|
*/
|
|
function wrapperReverse() {
|
|
var value = this.__wrapped__;
|
|
if (value instanceof LazyWrapper) {
|
|
var wrapped = value;
|
|
if (this.__actions__.length) {
|
|
wrapped = new LazyWrapper(this);
|
|
}
|
|
wrapped = wrapped.reverse();
|
|
wrapped.__actions__.push({
|
|
'func': thru,
|
|
'args': [reverse],
|
|
'thisArg': undefined
|
|
});
|
|
return new LodashWrapper(wrapped, this.__chain__);
|
|
}
|
|
return this.thru(reverse);
|
|
}
|
|
|
|
/**
|
|
* Executes the chain sequence to resolve the unwrapped value.
|
|
*
|
|
* @name value
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @alias toJSON, valueOf
|
|
* @category Seq
|
|
* @returns {*} Returns the resolved unwrapped value.
|
|
* @example
|
|
*
|
|
* _([1, 2, 3]).value();
|
|
* // => [1, 2, 3]
|
|
*/
|
|
function wrapperValue() {
|
|
return baseWrapperValue(this.__wrapped__, this.__actions__);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Checks if `predicate` returns truthy for **all** elements of `collection`.
|
|
* Iteration is stopped once `predicate` returns falsey. The predicate is
|
|
* invoked with three arguments: (value, index|key, collection).
|
|
*
|
|
* **Note:** This method returns `true` for
|
|
* [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
|
|
* [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
|
|
* elements of empty collections.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [predicate=_.identity] The function invoked per iteration.
|
|
* @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
|
|
* @returns {boolean} Returns `true` if all elements pass the predicate check,
|
|
* else `false`.
|
|
* @example
|
|
*
|
|
* _.every([true, 1, null, 'yes'], Boolean);
|
|
* // => false
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': false },
|
|
* { 'user': 'fred', 'age': 40, 'active': false }
|
|
* ];
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.every(users, { 'user': 'barney', 'active': false });
|
|
* // => false
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.every(users, ['active', false]);
|
|
* // => true
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.every(users, 'active');
|
|
* // => false
|
|
*/
|
|
function every(collection, predicate, guard) {
|
|
var func = isArray(collection) ? arrayEvery : baseEvery;
|
|
if (guard && isIterateeCall(collection, predicate, guard)) {
|
|
predicate = undefined;
|
|
}
|
|
return func(collection, getIteratee(predicate, 3));
|
|
}
|
|
|
|
/**
|
|
* Iterates over elements of `collection`, returning an array of all elements
|
|
* `predicate` returns truthy for. The predicate is invoked with three
|
|
* arguments: (value, index|key, collection).
|
|
*
|
|
* **Note:** Unlike `_.remove`, this method returns a new array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [predicate=_.identity] The function invoked per iteration.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @see _.reject
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': true },
|
|
* { 'user': 'fred', 'age': 40, 'active': false }
|
|
* ];
|
|
*
|
|
* _.filter(users, function(o) { return !o.active; });
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.filter(users, { 'age': 36, 'active': true });
|
|
* // => objects for ['barney']
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.filter(users, ['active', false]);
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.filter(users, 'active');
|
|
* // => objects for ['barney']
|
|
*/
|
|
function filter(collection, predicate) {
|
|
var func = isArray(collection) ? arrayFilter : baseFilter;
|
|
return func(collection, getIteratee(predicate, 3));
|
|
}
|
|
|
|
/**
|
|
* Iterates over elements of `collection`, returning the first element
|
|
* `predicate` returns truthy for. The predicate is invoked with three
|
|
* arguments: (value, index|key, collection).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to inspect.
|
|
* @param {Function} [predicate=_.identity] The function invoked per iteration.
|
|
* @param {number} [fromIndex=0] The index to search from.
|
|
* @returns {*} Returns the matched element, else `undefined`.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': true },
|
|
* { 'user': 'fred', 'age': 40, 'active': false },
|
|
* { 'user': 'pebbles', 'age': 1, 'active': true }
|
|
* ];
|
|
*
|
|
* _.find(users, function(o) { return o.age < 40; });
|
|
* // => object for 'barney'
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.find(users, { 'age': 1, 'active': true });
|
|
* // => object for 'pebbles'
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.find(users, ['active', false]);
|
|
* // => object for 'fred'
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.find(users, 'active');
|
|
* // => object for 'barney'
|
|
*/
|
|
var find = createFind(findIndex);
|
|
|
|
/**
|
|
* Iterates over elements of `collection` and invokes `iteratee` for each element.
|
|
* The iteratee is invoked with three arguments: (value, index|key, collection).
|
|
* Iteratee functions may exit iteration early by explicitly returning `false`.
|
|
*
|
|
* **Note:** As with other "Collections" methods, objects with a "length"
|
|
* property are iterated like arrays. To avoid this behavior use `_.forIn`
|
|
* or `_.forOwn` for object iteration.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @alias each
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
|
|
* @returns {Array|Object} Returns `collection`.
|
|
* @see _.forEachRight
|
|
* @example
|
|
*
|
|
* _.forEach([1, 2], function(value) {
|
|
* console.log(value);
|
|
* });
|
|
* // => Logs `1` then `2`.
|
|
*
|
|
* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
|
|
* console.log(key);
|
|
* });
|
|
* // => Logs 'a' then 'b' (iteration order is not guaranteed).
|
|
*/
|
|
function forEach(collection, iteratee) {
|
|
var func = isArray(collection) ? arrayEach : baseEach;
|
|
return func(collection, getIteratee(iteratee, 3));
|
|
}
|
|
|
|
/**
|
|
* Creates an object composed of keys generated from the results of running
|
|
* each element of `collection` thru `iteratee`. The order of grouped values
|
|
* is determined by the order they occur in `collection`. The corresponding
|
|
* value of each key is an array of elements responsible for generating the
|
|
* key. The iteratee is invoked with one argument: (value).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=_.identity] The iteratee to transform keys.
|
|
* @returns {Object} Returns the composed aggregate object.
|
|
* @example
|
|
*
|
|
* _.groupBy([6.1, 4.2, 6.3], Math.floor);
|
|
* // => { '4': [4.2], '6': [6.1, 6.3] }
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.groupBy(['one', 'two', 'three'], 'length');
|
|
* // => { '3': ['one', 'two'], '5': ['three'] }
|
|
*/
|
|
var groupBy = createAggregator(function(result, value, key) {
|
|
if (hasOwnProperty.call(result, key)) {
|
|
result[key].push(value);
|
|
} else {
|
|
baseAssignValue(result, key, [value]);
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Creates an array of values by running each element in `collection` thru
|
|
* `iteratee`. The iteratee is invoked with three arguments:
|
|
* (value, index|key, collection).
|
|
*
|
|
* Many lodash methods are guarded to work as iteratees for methods like
|
|
* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
|
|
*
|
|
* The guarded methods are:
|
|
* `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
|
|
* `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
|
|
* `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
|
|
* `template`, `trim`, `trimEnd`, `trimStart`, and `words`
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
|
|
* @returns {Array} Returns the new mapped array.
|
|
* @example
|
|
*
|
|
* function square(n) {
|
|
* return n * n;
|
|
* }
|
|
*
|
|
* _.map([4, 8], square);
|
|
* // => [16, 64]
|
|
*
|
|
* _.map({ 'a': 4, 'b': 8 }, square);
|
|
* // => [16, 64] (iteration order is not guaranteed)
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney' },
|
|
* { 'user': 'fred' }
|
|
* ];
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.map(users, 'user');
|
|
* // => ['barney', 'fred']
|
|
*/
|
|
function map(collection, iteratee) {
|
|
var func = isArray(collection) ? arrayMap : baseMap;
|
|
return func(collection, getIteratee(iteratee, 3));
|
|
}
|
|
|
|
/**
|
|
* Reduces `collection` to a value which is the accumulated result of running
|
|
* each element in `collection` thru `iteratee`, where each successive
|
|
* invocation is supplied the return value of the previous. If `accumulator`
|
|
* is not given, the first element of `collection` is used as the initial
|
|
* value. The iteratee is invoked with four arguments:
|
|
* (accumulator, value, index|key, collection).
|
|
*
|
|
* Many lodash methods are guarded to work as iteratees for methods like
|
|
* `_.reduce`, `_.reduceRight`, and `_.transform`.
|
|
*
|
|
* The guarded methods are:
|
|
* `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
|
|
* and `sortBy`
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=_.identity] The function invoked per iteration.
|
|
* @param {*} [accumulator] The initial value.
|
|
* @returns {*} Returns the accumulated value.
|
|
* @see _.reduceRight
|
|
* @example
|
|
*
|
|
* _.reduce([1, 2], function(sum, n) {
|
|
* return sum + n;
|
|
* }, 0);
|
|
* // => 3
|
|
*
|
|
* _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
|
|
* (result[value] || (result[value] = [])).push(key);
|
|
* return result;
|
|
* }, {});
|
|
* // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
|
|
*/
|
|
function reduce(collection, iteratee, accumulator) {
|
|
var func = isArray(collection) ? arrayReduce : baseReduce,
|
|
initAccum = arguments.length < 3;
|
|
|
|
return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
|
|
}
|
|
|
|
/**
|
|
* The opposite of `_.filter`; this method returns the elements of `collection`
|
|
* that `predicate` does **not** return truthy for.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {Function} [predicate=_.identity] The function invoked per iteration.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @see _.filter
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': false },
|
|
* { 'user': 'fred', 'age': 40, 'active': true }
|
|
* ];
|
|
*
|
|
* _.reject(users, function(o) { return !o.active; });
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.reject(users, { 'age': 40, 'active': true });
|
|
* // => objects for ['barney']
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.reject(users, ['active', false]);
|
|
* // => objects for ['fred']
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.reject(users, 'active');
|
|
* // => objects for ['barney']
|
|
*/
|
|
function reject(collection, predicate) {
|
|
var func = isArray(collection) ? arrayFilter : baseFilter;
|
|
return func(collection, negate(getIteratee(predicate, 3)));
|
|
}
|
|
|
|
/**
|
|
* Creates an array of elements, sorted in ascending order by the results of
|
|
* running each element in a collection thru each iteratee. This method
|
|
* performs a stable sort, that is, it preserves the original sort order of
|
|
* equal elements. The iteratees are invoked with one argument: (value).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Collection
|
|
* @param {Array|Object} collection The collection to iterate over.
|
|
* @param {...(Function|Function[])} [iteratees=[_.identity]]
|
|
* The iteratees to sort by.
|
|
* @returns {Array} Returns the new sorted array.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'fred', 'age': 48 },
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'barney', 'age': 34 }
|
|
* ];
|
|
*
|
|
* _.sortBy(users, [function(o) { return o.user; }]);
|
|
* // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
|
|
*
|
|
* _.sortBy(users, ['user', 'age']);
|
|
* // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
|
|
*/
|
|
var sortBy = baseRest(function(collection, iteratees) {
|
|
if (collection == null) {
|
|
return [];
|
|
}
|
|
var length = iteratees.length;
|
|
if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
|
|
iteratees = [];
|
|
} else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
|
|
iteratees = [iteratees[0]];
|
|
}
|
|
return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
|
|
});
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Gets the timestamp of the number of milliseconds that have elapsed since
|
|
* the Unix epoch (1 January 1970 00:00:00 UTC).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 2.4.0
|
|
* @category Date
|
|
* @returns {number} Returns the timestamp.
|
|
* @example
|
|
*
|
|
* _.defer(function(stamp) {
|
|
* console.log(_.now() - stamp);
|
|
* }, _.now());
|
|
* // => Logs the number of milliseconds it took for the deferred invocation.
|
|
*/
|
|
var now = function() {
|
|
return root.Date.now();
|
|
};
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a debounced function that delays invoking `func` until after `wait`
|
|
* milliseconds have elapsed since the last time the debounced function was
|
|
* invoked. The debounced function comes with a `cancel` method to cancel
|
|
* delayed `func` invocations and a `flush` method to immediately invoke them.
|
|
* Provide `options` to indicate whether `func` should be invoked on the
|
|
* leading and/or trailing edge of the `wait` timeout. The `func` is invoked
|
|
* with the last arguments provided to the debounced function. Subsequent
|
|
* calls to the debounced function return the result of the last `func`
|
|
* invocation.
|
|
*
|
|
* **Note:** If `leading` and `trailing` options are `true`, `func` is
|
|
* invoked on the trailing edge of the timeout only if the debounced function
|
|
* is invoked more than once during the `wait` timeout.
|
|
*
|
|
* If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
|
|
* until to the next tick, similar to `setTimeout` with a timeout of `0`.
|
|
*
|
|
* See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
|
|
* for details over the differences between `_.debounce` and `_.throttle`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Function
|
|
* @param {Function} func The function to debounce.
|
|
* @param {number} [wait=0] The number of milliseconds to delay.
|
|
* @param {Object} [options={}] The options object.
|
|
* @param {boolean} [options.leading=false]
|
|
* Specify invoking on the leading edge of the timeout.
|
|
* @param {number} [options.maxWait]
|
|
* The maximum time `func` is allowed to be delayed before it's invoked.
|
|
* @param {boolean} [options.trailing=true]
|
|
* Specify invoking on the trailing edge of the timeout.
|
|
* @returns {Function} Returns the new debounced function.
|
|
* @example
|
|
*
|
|
* // Avoid costly calculations while the window size is in flux.
|
|
* jQuery(window).on('resize', _.debounce(calculateLayout, 150));
|
|
*
|
|
* // Invoke `sendMail` when clicked, debouncing subsequent calls.
|
|
* jQuery(element).on('click', _.debounce(sendMail, 300, {
|
|
* 'leading': true,
|
|
* 'trailing': false
|
|
* }));
|
|
*
|
|
* // Ensure `batchLog` is invoked once after 1 second of debounced calls.
|
|
* var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
|
|
* var source = new EventSource('/stream');
|
|
* jQuery(source).on('message', debounced);
|
|
*
|
|
* // Cancel the trailing debounced invocation.
|
|
* jQuery(window).on('popstate', debounced.cancel);
|
|
*/
|
|
function debounce(func, wait, options) {
|
|
var lastArgs,
|
|
lastThis,
|
|
maxWait,
|
|
result,
|
|
timerId,
|
|
lastCallTime,
|
|
lastInvokeTime = 0,
|
|
leading = false,
|
|
maxing = false,
|
|
trailing = true;
|
|
|
|
if (typeof func != 'function') {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
wait = toNumber(wait) || 0;
|
|
if (isObject(options)) {
|
|
leading = !!options.leading;
|
|
maxing = 'maxWait' in options;
|
|
maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
|
|
trailing = 'trailing' in options ? !!options.trailing : trailing;
|
|
}
|
|
|
|
function invokeFunc(time) {
|
|
var args = lastArgs,
|
|
thisArg = lastThis;
|
|
|
|
lastArgs = lastThis = undefined;
|
|
lastInvokeTime = time;
|
|
result = func.apply(thisArg, args);
|
|
return result;
|
|
}
|
|
|
|
function leadingEdge(time) {
|
|
// Reset any `maxWait` timer.
|
|
lastInvokeTime = time;
|
|
// Start the timer for the trailing edge.
|
|
timerId = setTimeout(timerExpired, wait);
|
|
// Invoke the leading edge.
|
|
return leading ? invokeFunc(time) : result;
|
|
}
|
|
|
|
function remainingWait(time) {
|
|
var timeSinceLastCall = time - lastCallTime,
|
|
timeSinceLastInvoke = time - lastInvokeTime,
|
|
timeWaiting = wait - timeSinceLastCall;
|
|
|
|
return maxing
|
|
? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
|
|
: timeWaiting;
|
|
}
|
|
|
|
function shouldInvoke(time) {
|
|
var timeSinceLastCall = time - lastCallTime,
|
|
timeSinceLastInvoke = time - lastInvokeTime;
|
|
|
|
// Either this is the first call, activity has stopped and we're at the
|
|
// trailing edge, the system time has gone backwards and we're treating
|
|
// it as the trailing edge, or we've hit the `maxWait` limit.
|
|
return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
|
|
(timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
|
|
}
|
|
|
|
function timerExpired() {
|
|
var time = now();
|
|
if (shouldInvoke(time)) {
|
|
return trailingEdge(time);
|
|
}
|
|
// Restart the timer.
|
|
timerId = setTimeout(timerExpired, remainingWait(time));
|
|
}
|
|
|
|
function trailingEdge(time) {
|
|
timerId = undefined;
|
|
|
|
// Only invoke if we have `lastArgs` which means `func` has been
|
|
// debounced at least once.
|
|
if (trailing && lastArgs) {
|
|
return invokeFunc(time);
|
|
}
|
|
lastArgs = lastThis = undefined;
|
|
return result;
|
|
}
|
|
|
|
function cancel() {
|
|
if (timerId !== undefined) {
|
|
clearTimeout(timerId);
|
|
}
|
|
lastInvokeTime = 0;
|
|
lastArgs = lastCallTime = lastThis = timerId = undefined;
|
|
}
|
|
|
|
function flush() {
|
|
return timerId === undefined ? result : trailingEdge(now());
|
|
}
|
|
|
|
function debounced() {
|
|
var time = now(),
|
|
isInvoking = shouldInvoke(time);
|
|
|
|
lastArgs = arguments;
|
|
lastThis = this;
|
|
lastCallTime = time;
|
|
|
|
if (isInvoking) {
|
|
if (timerId === undefined) {
|
|
return leadingEdge(lastCallTime);
|
|
}
|
|
if (maxing) {
|
|
// Handle invocations in a tight loop.
|
|
timerId = setTimeout(timerExpired, wait);
|
|
return invokeFunc(lastCallTime);
|
|
}
|
|
}
|
|
if (timerId === undefined) {
|
|
timerId = setTimeout(timerExpired, wait);
|
|
}
|
|
return result;
|
|
}
|
|
debounced.cancel = cancel;
|
|
debounced.flush = flush;
|
|
return debounced;
|
|
}
|
|
|
|
/**
|
|
* Invokes `func` after `wait` milliseconds. Any additional arguments are
|
|
* provided to `func` when it's invoked.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Function
|
|
* @param {Function} func The function to delay.
|
|
* @param {number} wait The number of milliseconds to delay invocation.
|
|
* @param {...*} [args] The arguments to invoke `func` with.
|
|
* @returns {number} Returns the timer id.
|
|
* @example
|
|
*
|
|
* _.delay(function(text) {
|
|
* console.log(text);
|
|
* }, 1000, 'later');
|
|
* // => Logs 'later' after one second.
|
|
*/
|
|
var delay = baseRest(function(func, wait, args) {
|
|
return baseDelay(func, toNumber(wait) || 0, args);
|
|
});
|
|
|
|
/**
|
|
* Creates a function that memoizes the result of `func`. If `resolver` is
|
|
* provided, it determines the cache key for storing the result based on the
|
|
* arguments provided to the memoized function. By default, the first argument
|
|
* provided to the memoized function is used as the map cache key. The `func`
|
|
* is invoked with the `this` binding of the memoized function.
|
|
*
|
|
* **Note:** The cache is exposed as the `cache` property on the memoized
|
|
* function. Its creation may be customized by replacing the `_.memoize.Cache`
|
|
* constructor with one whose instances implement the
|
|
* [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
|
|
* method interface of `clear`, `delete`, `get`, `has`, and `set`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Function
|
|
* @param {Function} func The function to have its output memoized.
|
|
* @param {Function} [resolver] The function to resolve the cache key.
|
|
* @returns {Function} Returns the new memoized function.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1, 'b': 2 };
|
|
* var other = { 'c': 3, 'd': 4 };
|
|
*
|
|
* var values = _.memoize(_.values);
|
|
* values(object);
|
|
* // => [1, 2]
|
|
*
|
|
* values(other);
|
|
* // => [3, 4]
|
|
*
|
|
* object.a = 2;
|
|
* values(object);
|
|
* // => [1, 2]
|
|
*
|
|
* // Modify the result cache.
|
|
* values.cache.set(object, ['a', 'b']);
|
|
* values(object);
|
|
* // => ['a', 'b']
|
|
*
|
|
* // Replace `_.memoize.Cache`.
|
|
* _.memoize.Cache = WeakMap;
|
|
*/
|
|
function memoize(func, resolver) {
|
|
if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
var memoized = function() {
|
|
var args = arguments,
|
|
key = resolver ? resolver.apply(this, args) : args[0],
|
|
cache = memoized.cache;
|
|
|
|
if (cache.has(key)) {
|
|
return cache.get(key);
|
|
}
|
|
var result = func.apply(this, args);
|
|
memoized.cache = cache.set(key, result) || cache;
|
|
return result;
|
|
};
|
|
memoized.cache = new (memoize.Cache || MapCache);
|
|
return memoized;
|
|
}
|
|
|
|
// Expose `MapCache`.
|
|
memoize.Cache = MapCache;
|
|
|
|
/**
|
|
* Creates a function that negates the result of the predicate `func`. The
|
|
* `func` predicate is invoked with the `this` binding and arguments of the
|
|
* created function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Function
|
|
* @param {Function} predicate The predicate to negate.
|
|
* @returns {Function} Returns the new negated function.
|
|
* @example
|
|
*
|
|
* function isEven(n) {
|
|
* return n % 2 == 0;
|
|
* }
|
|
*
|
|
* _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
|
|
* // => [1, 3, 5]
|
|
*/
|
|
function negate(predicate) {
|
|
if (typeof predicate != 'function') {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
return function() {
|
|
var args = arguments;
|
|
switch (args.length) {
|
|
case 0: return !predicate.call(this);
|
|
case 1: return !predicate.call(this, args[0]);
|
|
case 2: return !predicate.call(this, args[0], args[1]);
|
|
case 3: return !predicate.call(this, args[0], args[1], args[2]);
|
|
}
|
|
return !predicate.apply(this, args);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a throttled function that only invokes `func` at most once per
|
|
* every `wait` milliseconds. The throttled function comes with a `cancel`
|
|
* method to cancel delayed `func` invocations and a `flush` method to
|
|
* immediately invoke them. Provide `options` to indicate whether `func`
|
|
* should be invoked on the leading and/or trailing edge of the `wait`
|
|
* timeout. The `func` is invoked with the last arguments provided to the
|
|
* throttled function. Subsequent calls to the throttled function return the
|
|
* result of the last `func` invocation.
|
|
*
|
|
* **Note:** If `leading` and `trailing` options are `true`, `func` is
|
|
* invoked on the trailing edge of the timeout only if the throttled function
|
|
* is invoked more than once during the `wait` timeout.
|
|
*
|
|
* If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
|
|
* until to the next tick, similar to `setTimeout` with a timeout of `0`.
|
|
*
|
|
* See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
|
|
* for details over the differences between `_.throttle` and `_.debounce`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Function
|
|
* @param {Function} func The function to throttle.
|
|
* @param {number} [wait=0] The number of milliseconds to throttle invocations to.
|
|
* @param {Object} [options={}] The options object.
|
|
* @param {boolean} [options.leading=true]
|
|
* Specify invoking on the leading edge of the timeout.
|
|
* @param {boolean} [options.trailing=true]
|
|
* Specify invoking on the trailing edge of the timeout.
|
|
* @returns {Function} Returns the new throttled function.
|
|
* @example
|
|
*
|
|
* // Avoid excessively updating the position while scrolling.
|
|
* jQuery(window).on('scroll', _.throttle(updatePosition, 100));
|
|
*
|
|
* // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
|
|
* var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
|
|
* jQuery(element).on('click', throttled);
|
|
*
|
|
* // Cancel the trailing throttled invocation.
|
|
* jQuery(window).on('popstate', throttled.cancel);
|
|
*/
|
|
function throttle(func, wait, options) {
|
|
var leading = true,
|
|
trailing = true;
|
|
|
|
if (typeof func != 'function') {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
if (isObject(options)) {
|
|
leading = 'leading' in options ? !!options.leading : leading;
|
|
trailing = 'trailing' in options ? !!options.trailing : trailing;
|
|
}
|
|
return debounce(func, wait, {
|
|
'leading': leading,
|
|
'maxWait': wait,
|
|
'trailing': trailing
|
|
});
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a shallow clone of `value`.
|
|
*
|
|
* **Note:** This method is loosely based on the
|
|
* [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
|
|
* and supports cloning arrays, array buffers, booleans, date objects, maps,
|
|
* numbers, `Object` objects, regexes, sets, strings, symbols, and typed
|
|
* arrays. The own enumerable properties of `arguments` objects are cloned
|
|
* as plain objects. An empty object is returned for uncloneable values such
|
|
* as error objects, functions, DOM nodes, and WeakMaps.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to clone.
|
|
* @returns {*} Returns the cloned value.
|
|
* @see _.cloneDeep
|
|
* @example
|
|
*
|
|
* var objects = [{ 'a': 1 }, { 'b': 2 }];
|
|
*
|
|
* var shallow = _.clone(objects);
|
|
* console.log(shallow[0] === objects[0]);
|
|
* // => true
|
|
*/
|
|
function clone(value) {
|
|
return baseClone(value, CLONE_SYMBOLS_FLAG);
|
|
}
|
|
|
|
/**
|
|
* Performs a
|
|
* [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
|
|
* comparison between two values to determine if they are equivalent.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1 };
|
|
* var other = { 'a': 1 };
|
|
*
|
|
* _.eq(object, object);
|
|
* // => true
|
|
*
|
|
* _.eq(object, other);
|
|
* // => false
|
|
*
|
|
* _.eq('a', 'a');
|
|
* // => true
|
|
*
|
|
* _.eq('a', Object('a'));
|
|
* // => false
|
|
*
|
|
* _.eq(NaN, NaN);
|
|
* // => true
|
|
*/
|
|
function eq(value, other) {
|
|
return value === other || (value !== value && other !== other);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is likely an `arguments` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
|
|
* else `false`.
|
|
* @example
|
|
*
|
|
* _.isArguments(function() { return arguments; }());
|
|
* // => true
|
|
*
|
|
* _.isArguments([1, 2, 3]);
|
|
* // => false
|
|
*/
|
|
var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
|
|
return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
|
|
!propertyIsEnumerable.call(value, 'callee');
|
|
};
|
|
|
|
/**
|
|
* Checks if `value` is classified as an `Array` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an array, else `false`.
|
|
* @example
|
|
*
|
|
* _.isArray([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isArray(document.body.children);
|
|
* // => false
|
|
*
|
|
* _.isArray('abc');
|
|
* // => false
|
|
*
|
|
* _.isArray(_.noop);
|
|
* // => false
|
|
*/
|
|
var isArray = Array.isArray;
|
|
|
|
/**
|
|
* Checks if `value` is array-like. A value is considered array-like if it's
|
|
* not a function and has a `value.length` that's an integer greater than or
|
|
* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
|
|
* @example
|
|
*
|
|
* _.isArrayLike([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isArrayLike(document.body.children);
|
|
* // => true
|
|
*
|
|
* _.isArrayLike('abc');
|
|
* // => true
|
|
*
|
|
* _.isArrayLike(_.noop);
|
|
* // => false
|
|
*/
|
|
function isArrayLike(value) {
|
|
return value != null && isLength(value.length) && !isFunction(value);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.isArrayLike` except that it also checks if `value`
|
|
* is an object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an array-like object,
|
|
* else `false`.
|
|
* @example
|
|
*
|
|
* _.isArrayLikeObject([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isArrayLikeObject(document.body.children);
|
|
* // => true
|
|
*
|
|
* _.isArrayLikeObject('abc');
|
|
* // => false
|
|
*
|
|
* _.isArrayLikeObject(_.noop);
|
|
* // => false
|
|
*/
|
|
function isArrayLikeObject(value) {
|
|
return isObjectLike(value) && isArrayLike(value);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a buffer.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.3.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
|
|
* @example
|
|
*
|
|
* _.isBuffer(new Buffer(2));
|
|
* // => true
|
|
*
|
|
* _.isBuffer(new Uint8Array(2));
|
|
* // => false
|
|
*/
|
|
var isBuffer = nativeIsBuffer || stubFalse;
|
|
|
|
/**
|
|
* Checks if `value` is an empty object, collection, map, or set.
|
|
*
|
|
* Objects are considered empty if they have no own enumerable string keyed
|
|
* properties.
|
|
*
|
|
* Array-like values such as `arguments` objects, arrays, buffers, strings, or
|
|
* jQuery-like collections are considered empty if they have a `length` of `0`.
|
|
* Similarly, maps and sets are considered empty if they have a `size` of `0`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is empty, else `false`.
|
|
* @example
|
|
*
|
|
* _.isEmpty(null);
|
|
* // => true
|
|
*
|
|
* _.isEmpty(true);
|
|
* // => true
|
|
*
|
|
* _.isEmpty(1);
|
|
* // => true
|
|
*
|
|
* _.isEmpty([1, 2, 3]);
|
|
* // => false
|
|
*
|
|
* _.isEmpty({ 'a': 1 });
|
|
* // => false
|
|
*/
|
|
function isEmpty(value) {
|
|
if (value == null) {
|
|
return true;
|
|
}
|
|
if (isArrayLike(value) &&
|
|
(isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
|
|
isBuffer(value) || isTypedArray(value) || isArguments(value))) {
|
|
return !value.length;
|
|
}
|
|
var tag = getTag(value);
|
|
if (tag == mapTag || tag == setTag) {
|
|
return !value.size;
|
|
}
|
|
if (isPrototype(value)) {
|
|
return !baseKeys(value).length;
|
|
}
|
|
for (var key in value) {
|
|
if (hasOwnProperty.call(value, key)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Performs a deep comparison between two values to determine if they are
|
|
* equivalent.
|
|
*
|
|
* **Note:** This method supports comparing arrays, array buffers, booleans,
|
|
* date objects, error objects, maps, numbers, `Object` objects, regexes,
|
|
* sets, strings, symbols, and typed arrays. `Object` objects are compared
|
|
* by their own, not inherited, enumerable properties. Functions and DOM
|
|
* nodes are compared by strict equality, i.e. `===`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to compare.
|
|
* @param {*} other The other value to compare.
|
|
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1 };
|
|
* var other = { 'a': 1 };
|
|
*
|
|
* _.isEqual(object, other);
|
|
* // => true
|
|
*
|
|
* object === other;
|
|
* // => false
|
|
*/
|
|
function isEqual(value, other) {
|
|
return baseIsEqual(value, other);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Function` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
|
|
* @example
|
|
*
|
|
* _.isFunction(_);
|
|
* // => true
|
|
*
|
|
* _.isFunction(/abc/);
|
|
* // => false
|
|
*/
|
|
function isFunction(value) {
|
|
if (!isObject(value)) {
|
|
return false;
|
|
}
|
|
// The use of `Object#toString` avoids issues with the `typeof` operator
|
|
// in Safari 9 which returns 'object' for typed arrays and other constructors.
|
|
var tag = baseGetTag(value);
|
|
return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a valid array-like length.
|
|
*
|
|
* **Note:** This method is loosely based on
|
|
* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
|
|
* @example
|
|
*
|
|
* _.isLength(3);
|
|
* // => true
|
|
*
|
|
* _.isLength(Number.MIN_VALUE);
|
|
* // => false
|
|
*
|
|
* _.isLength(Infinity);
|
|
* // => false
|
|
*
|
|
* _.isLength('3');
|
|
* // => false
|
|
*/
|
|
function isLength(value) {
|
|
return typeof value == 'number' &&
|
|
value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is the
|
|
* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
|
|
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.1.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
|
|
* @example
|
|
*
|
|
* _.isObject({});
|
|
* // => true
|
|
*
|
|
* _.isObject([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isObject(_.noop);
|
|
* // => true
|
|
*
|
|
* _.isObject(null);
|
|
* // => false
|
|
*/
|
|
function isObject(value) {
|
|
var type = typeof value;
|
|
return value != null && (type == 'object' || type == 'function');
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is object-like. A value is object-like if it's not `null`
|
|
* and has a `typeof` result of "object".
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
|
|
* @example
|
|
*
|
|
* _.isObjectLike({});
|
|
* // => true
|
|
*
|
|
* _.isObjectLike([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isObjectLike(_.noop);
|
|
* // => false
|
|
*
|
|
* _.isObjectLike(null);
|
|
* // => false
|
|
*/
|
|
function isObjectLike(value) {
|
|
return value != null && typeof value == 'object';
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Map` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.3.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a map, else `false`.
|
|
* @example
|
|
*
|
|
* _.isMap(new Map);
|
|
* // => true
|
|
*
|
|
* _.isMap(new WeakMap);
|
|
* // => false
|
|
*/
|
|
var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
|
|
|
|
/**
|
|
* Checks if `value` is a plain object, that is, an object created by the
|
|
* `Object` constructor or one with a `[[Prototype]]` of `null`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.8.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* }
|
|
*
|
|
* _.isPlainObject(new Foo);
|
|
* // => false
|
|
*
|
|
* _.isPlainObject([1, 2, 3]);
|
|
* // => false
|
|
*
|
|
* _.isPlainObject({ 'x': 0, 'y': 0 });
|
|
* // => true
|
|
*
|
|
* _.isPlainObject(Object.create(null));
|
|
* // => true
|
|
*/
|
|
function isPlainObject(value) {
|
|
if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
|
|
return false;
|
|
}
|
|
var proto = getPrototype(value);
|
|
if (proto === null) {
|
|
return true;
|
|
}
|
|
var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
|
|
return typeof Ctor == 'function' && Ctor instanceof Ctor &&
|
|
funcToString.call(Ctor) == objectCtorString;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Set` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.3.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a set, else `false`.
|
|
* @example
|
|
*
|
|
* _.isSet(new Set);
|
|
* // => true
|
|
*
|
|
* _.isSet(new WeakSet);
|
|
* // => false
|
|
*/
|
|
var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `String` primitive or object.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a string, else `false`.
|
|
* @example
|
|
*
|
|
* _.isString('abc');
|
|
* // => true
|
|
*
|
|
* _.isString(1);
|
|
* // => false
|
|
*/
|
|
function isString(value) {
|
|
return typeof value == 'string' ||
|
|
(!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Symbol` primitive or object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
|
|
* @example
|
|
*
|
|
* _.isSymbol(Symbol.iterator);
|
|
* // => true
|
|
*
|
|
* _.isSymbol('abc');
|
|
* // => false
|
|
*/
|
|
function isSymbol(value) {
|
|
return typeof value == 'symbol' ||
|
|
(isObjectLike(value) && baseGetTag(value) == symbolTag);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a typed array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
|
|
* @example
|
|
*
|
|
* _.isTypedArray(new Uint8Array);
|
|
* // => true
|
|
*
|
|
* _.isTypedArray([]);
|
|
* // => false
|
|
*/
|
|
var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
|
|
|
|
/**
|
|
* Converts `value` to an array.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to convert.
|
|
* @returns {Array} Returns the converted array.
|
|
* @example
|
|
*
|
|
* _.toArray({ 'a': 1, 'b': 2 });
|
|
* // => [1, 2]
|
|
*
|
|
* _.toArray('abc');
|
|
* // => ['a', 'b', 'c']
|
|
*
|
|
* _.toArray(1);
|
|
* // => []
|
|
*
|
|
* _.toArray(null);
|
|
* // => []
|
|
*/
|
|
function toArray(value) {
|
|
if (!value) {
|
|
return [];
|
|
}
|
|
if (isArrayLike(value)) {
|
|
return isString(value) ? stringToArray(value) : copyArray(value);
|
|
}
|
|
if (symIterator && value[symIterator]) {
|
|
return iteratorToArray(value[symIterator]());
|
|
}
|
|
var tag = getTag(value),
|
|
func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
|
|
|
|
return func(value);
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to a finite number.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.12.0
|
|
* @category Lang
|
|
* @param {*} value The value to convert.
|
|
* @returns {number} Returns the converted number.
|
|
* @example
|
|
*
|
|
* _.toFinite(3.2);
|
|
* // => 3.2
|
|
*
|
|
* _.toFinite(Number.MIN_VALUE);
|
|
* // => 5e-324
|
|
*
|
|
* _.toFinite(Infinity);
|
|
* // => 1.7976931348623157e+308
|
|
*
|
|
* _.toFinite('3.2');
|
|
* // => 3.2
|
|
*/
|
|
function toFinite(value) {
|
|
if (!value) {
|
|
return value === 0 ? value : 0;
|
|
}
|
|
value = toNumber(value);
|
|
if (value === INFINITY || value === -INFINITY) {
|
|
var sign = (value < 0 ? -1 : 1);
|
|
return sign * MAX_INTEGER;
|
|
}
|
|
return value === value ? value : 0;
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to an integer.
|
|
*
|
|
* **Note:** This method is loosely based on
|
|
* [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to convert.
|
|
* @returns {number} Returns the converted integer.
|
|
* @example
|
|
*
|
|
* _.toInteger(3.2);
|
|
* // => 3
|
|
*
|
|
* _.toInteger(Number.MIN_VALUE);
|
|
* // => 0
|
|
*
|
|
* _.toInteger(Infinity);
|
|
* // => 1.7976931348623157e+308
|
|
*
|
|
* _.toInteger('3.2');
|
|
* // => 3
|
|
*/
|
|
function toInteger(value) {
|
|
var result = toFinite(value),
|
|
remainder = result % 1;
|
|
|
|
return result === result ? (remainder ? result - remainder : result) : 0;
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to a number.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to process.
|
|
* @returns {number} Returns the number.
|
|
* @example
|
|
*
|
|
* _.toNumber(3.2);
|
|
* // => 3.2
|
|
*
|
|
* _.toNumber(Number.MIN_VALUE);
|
|
* // => 5e-324
|
|
*
|
|
* _.toNumber(Infinity);
|
|
* // => Infinity
|
|
*
|
|
* _.toNumber('3.2');
|
|
* // => 3.2
|
|
*/
|
|
function toNumber(value) {
|
|
if (typeof value == 'number') {
|
|
return value;
|
|
}
|
|
if (isSymbol(value)) {
|
|
return NAN;
|
|
}
|
|
if (isObject(value)) {
|
|
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
|
|
value = isObject(other) ? (other + '') : other;
|
|
}
|
|
if (typeof value != 'string') {
|
|
return value === 0 ? value : +value;
|
|
}
|
|
value = value.replace(reTrim, '');
|
|
var isBinary = reIsBinary.test(value);
|
|
return (isBinary || reIsOctal.test(value))
|
|
? freeParseInt(value.slice(2), isBinary ? 2 : 8)
|
|
: (reIsBadHex.test(value) ? NAN : +value);
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to a plain object flattening inherited enumerable string
|
|
* keyed properties of `value` to own properties of the plain object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to convert.
|
|
* @returns {Object} Returns the converted plain object.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.b = 2;
|
|
* }
|
|
*
|
|
* Foo.prototype.c = 3;
|
|
*
|
|
* _.assign({ 'a': 1 }, new Foo);
|
|
* // => { 'a': 1, 'b': 2 }
|
|
*
|
|
* _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
|
|
* // => { 'a': 1, 'b': 2, 'c': 3 }
|
|
*/
|
|
function toPlainObject(value) {
|
|
return copyObject(value, keysIn(value));
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to a string. An empty string is returned for `null`
|
|
* and `undefined` values. The sign of `-0` is preserved.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Lang
|
|
* @param {*} value The value to convert.
|
|
* @returns {string} Returns the converted string.
|
|
* @example
|
|
*
|
|
* _.toString(null);
|
|
* // => ''
|
|
*
|
|
* _.toString(-0);
|
|
* // => '-0'
|
|
*
|
|
* _.toString([1, 2, 3]);
|
|
* // => '1,2,3'
|
|
*/
|
|
function toString(value) {
|
|
return value == null ? '' : baseToString(value);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* This method is like `_.assign` except that it iterates over own and
|
|
* inherited source properties.
|
|
*
|
|
* **Note:** This method mutates `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @alias extend
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @returns {Object} Returns `object`.
|
|
* @see _.assign
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* }
|
|
*
|
|
* function Bar() {
|
|
* this.c = 3;
|
|
* }
|
|
*
|
|
* Foo.prototype.b = 2;
|
|
* Bar.prototype.d = 4;
|
|
*
|
|
* _.assignIn({ 'a': 0 }, new Foo, new Bar);
|
|
* // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
|
|
*/
|
|
var assignIn = createAssigner(function(object, source) {
|
|
copyObject(source, keysIn(source), object);
|
|
});
|
|
|
|
/**
|
|
* Gets the value at `path` of `object`. If the resolved value is
|
|
* `undefined`, the `defaultValue` is returned in its place.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.7.0
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path of the property to get.
|
|
* @param {*} [defaultValue] The value returned for `undefined` resolved values.
|
|
* @returns {*} Returns the resolved value.
|
|
* @example
|
|
*
|
|
* var object = { 'a': [{ 'b': { 'c': 3 } }] };
|
|
*
|
|
* _.get(object, 'a[0].b.c');
|
|
* // => 3
|
|
*
|
|
* _.get(object, ['a', '0', 'b', 'c']);
|
|
* // => 3
|
|
*
|
|
* _.get(object, 'a.b.c', 'default');
|
|
* // => 'default'
|
|
*/
|
|
function get(object, path, defaultValue) {
|
|
var result = object == null ? undefined : baseGet(object, path);
|
|
return result === undefined ? defaultValue : result;
|
|
}
|
|
|
|
/**
|
|
* Checks if `path` is a direct or inherited property of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path to check.
|
|
* @returns {boolean} Returns `true` if `path` exists, else `false`.
|
|
* @example
|
|
*
|
|
* var object = _.create({ 'a': _.create({ 'b': 2 }) });
|
|
*
|
|
* _.hasIn(object, 'a');
|
|
* // => true
|
|
*
|
|
* _.hasIn(object, 'a.b');
|
|
* // => true
|
|
*
|
|
* _.hasIn(object, ['a', 'b']);
|
|
* // => true
|
|
*
|
|
* _.hasIn(object, 'b');
|
|
* // => false
|
|
*/
|
|
function hasIn(object, path) {
|
|
return object != null && hasPath(object, path, baseHasIn);
|
|
}
|
|
|
|
/**
|
|
* Invokes the method at `path` of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @param {Array|string} path The path of the method to invoke.
|
|
* @param {...*} [args] The arguments to invoke the method with.
|
|
* @returns {*} Returns the result of the invoked method.
|
|
* @example
|
|
*
|
|
* var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
|
|
*
|
|
* _.invoke(object, 'a[0].b.c.slice', 1, 3);
|
|
* // => [2, 3]
|
|
*/
|
|
var invoke = baseRest(baseInvoke);
|
|
|
|
/**
|
|
* Creates an array of the own enumerable property names of `object`.
|
|
*
|
|
* **Note:** Non-object values are coerced to objects. See the
|
|
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* this.b = 2;
|
|
* }
|
|
*
|
|
* Foo.prototype.c = 3;
|
|
*
|
|
* _.keys(new Foo);
|
|
* // => ['a', 'b'] (iteration order is not guaranteed)
|
|
*
|
|
* _.keys('hi');
|
|
* // => ['0', '1']
|
|
*/
|
|
function keys(object) {
|
|
return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of the own and inherited enumerable property names of `object`.
|
|
*
|
|
* **Note:** Non-object values are coerced to objects.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 3.0.0
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* this.b = 2;
|
|
* }
|
|
*
|
|
* Foo.prototype.c = 3;
|
|
*
|
|
* _.keysIn(new Foo);
|
|
* // => ['a', 'b', 'c'] (iteration order is not guaranteed)
|
|
*/
|
|
function keysIn(object) {
|
|
return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.assign` except that it recursively merges own and
|
|
* inherited enumerable string keyed properties of source objects into the
|
|
* destination object. Source properties that resolve to `undefined` are
|
|
* skipped if a destination value exists. Array and plain object properties
|
|
* are merged recursively. Other objects and value types are overridden by
|
|
* assignment. Source objects are applied from left to right. Subsequent
|
|
* sources overwrite property assignments of previous sources.
|
|
*
|
|
* **Note:** This method mutates `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 0.5.0
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @returns {Object} Returns `object`.
|
|
* @example
|
|
*
|
|
* var object = {
|
|
* 'a': [{ 'b': 2 }, { 'd': 4 }]
|
|
* };
|
|
*
|
|
* var other = {
|
|
* 'a': [{ 'c': 3 }, { 'e': 5 }]
|
|
* };
|
|
*
|
|
* _.merge(object, other);
|
|
* // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
|
|
*/
|
|
var merge = createAssigner(function(object, source, srcIndex) {
|
|
baseMerge(object, source, srcIndex);
|
|
});
|
|
|
|
/**
|
|
* The opposite of `_.pick`; this method creates an object composed of the
|
|
* own and inherited enumerable property paths of `object` that are not omitted.
|
|
*
|
|
* **Note:** This method is considerably slower than `_.pick`.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The source object.
|
|
* @param {...(string|string[])} [paths] The property paths to omit.
|
|
* @returns {Object} Returns the new object.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1, 'b': '2', 'c': 3 };
|
|
*
|
|
* _.omit(object, ['a', 'c']);
|
|
* // => { 'b': '2' }
|
|
*/
|
|
var omit = flatRest(function(object, paths) {
|
|
var result = {};
|
|
if (object == null) {
|
|
return result;
|
|
}
|
|
var isDeep = false;
|
|
paths = arrayMap(paths, function(path) {
|
|
path = castPath(path, object);
|
|
isDeep || (isDeep = path.length > 1);
|
|
return path;
|
|
});
|
|
copyObject(object, getAllKeysIn(object), result);
|
|
if (isDeep) {
|
|
result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
|
|
}
|
|
var length = paths.length;
|
|
while (length--) {
|
|
baseUnset(result, paths[length]);
|
|
}
|
|
return result;
|
|
});
|
|
|
|
/**
|
|
* Creates an object composed of the picked `object` properties.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The source object.
|
|
* @param {...(string|string[])} [paths] The property paths to pick.
|
|
* @returns {Object} Returns the new object.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1, 'b': '2', 'c': 3 };
|
|
*
|
|
* _.pick(object, ['a', 'c']);
|
|
* // => { 'a': 1, 'c': 3 }
|
|
*/
|
|
var pick = flatRest(function(object, paths) {
|
|
return object == null ? {} : basePick(object, paths);
|
|
});
|
|
|
|
/**
|
|
* Creates an array of the own enumerable string keyed property values of `object`.
|
|
*
|
|
* **Note:** Non-object values are coerced to objects.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to query.
|
|
* @returns {Array} Returns the array of property values.
|
|
* @example
|
|
*
|
|
* function Foo() {
|
|
* this.a = 1;
|
|
* this.b = 2;
|
|
* }
|
|
*
|
|
* Foo.prototype.c = 3;
|
|
*
|
|
* _.values(new Foo);
|
|
* // => [1, 2] (iteration order is not guaranteed)
|
|
*
|
|
* _.values('hi');
|
|
* // => ['h', 'i']
|
|
*/
|
|
function values(object) {
|
|
return object == null ? [] : baseValues(object, keys(object));
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a function that returns `value`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 2.4.0
|
|
* @category Util
|
|
* @param {*} value The value to return from the new function.
|
|
* @returns {Function} Returns the new constant function.
|
|
* @example
|
|
*
|
|
* var objects = _.times(2, _.constant({ 'a': 1 }));
|
|
*
|
|
* console.log(objects);
|
|
* // => [{ 'a': 1 }, { 'a': 1 }]
|
|
*
|
|
* console.log(objects[0] === objects[1]);
|
|
* // => true
|
|
*/
|
|
function constant(value) {
|
|
return function() {
|
|
return value;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* This method returns the first argument it receives.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Util
|
|
* @param {*} value Any value.
|
|
* @returns {*} Returns `value`.
|
|
* @example
|
|
*
|
|
* var object = { 'a': 1 };
|
|
*
|
|
* console.log(_.identity(object) === object);
|
|
* // => true
|
|
*/
|
|
function identity(value) {
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that invokes `func` with the arguments of the created
|
|
* function. If `func` is a property name, the created function returns the
|
|
* property value for a given element. If `func` is an array or object, the
|
|
* created function returns `true` for elements that contain the equivalent
|
|
* source properties, otherwise it returns `false`.
|
|
*
|
|
* @static
|
|
* @since 4.0.0
|
|
* @memberOf _
|
|
* @category Util
|
|
* @param {*} [func=_.identity] The value to convert to a callback.
|
|
* @returns {Function} Returns the callback.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'active': true },
|
|
* { 'user': 'fred', 'age': 40, 'active': false }
|
|
* ];
|
|
*
|
|
* // The `_.matches` iteratee shorthand.
|
|
* _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
|
|
* // => [{ 'user': 'barney', 'age': 36, 'active': true }]
|
|
*
|
|
* // The `_.matchesProperty` iteratee shorthand.
|
|
* _.filter(users, _.iteratee(['user', 'fred']));
|
|
* // => [{ 'user': 'fred', 'age': 40 }]
|
|
*
|
|
* // The `_.property` iteratee shorthand.
|
|
* _.map(users, _.iteratee('user'));
|
|
* // => ['barney', 'fred']
|
|
*
|
|
* // Create custom iteratee shorthands.
|
|
* _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
|
|
* return !_.isRegExp(func) ? iteratee(func) : function(string) {
|
|
* return func.test(string);
|
|
* };
|
|
* });
|
|
*
|
|
* _.filter(['abc', 'def'], /ef/);
|
|
* // => ['def']
|
|
*/
|
|
function iteratee(func) {
|
|
return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
|
|
}
|
|
|
|
/**
|
|
* Adds all own enumerable string keyed function properties of a source
|
|
* object to the destination object. If `object` is a function, then methods
|
|
* are added to its prototype as well.
|
|
*
|
|
* **Note:** Use `_.runInContext` to create a pristine `lodash` function to
|
|
* avoid conflicts caused by modifying the original.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Util
|
|
* @param {Function|Object} [object=lodash] The destination object.
|
|
* @param {Object} source The object of functions to add.
|
|
* @param {Object} [options={}] The options object.
|
|
* @param {boolean} [options.chain=true] Specify whether mixins are chainable.
|
|
* @returns {Function|Object} Returns `object`.
|
|
* @example
|
|
*
|
|
* function vowels(string) {
|
|
* return _.filter(string, function(v) {
|
|
* return /[aeiou]/i.test(v);
|
|
* });
|
|
* }
|
|
*
|
|
* _.mixin({ 'vowels': vowels });
|
|
* _.vowels('fred');
|
|
* // => ['e']
|
|
*
|
|
* _('fred').vowels().value();
|
|
* // => ['e']
|
|
*
|
|
* _.mixin({ 'vowels': vowels }, { 'chain': false });
|
|
* _('fred').vowels();
|
|
* // => ['e']
|
|
*/
|
|
function mixin(object, source, options) {
|
|
var props = keys(source),
|
|
methodNames = baseFunctions(source, props);
|
|
|
|
if (options == null &&
|
|
!(isObject(source) && (methodNames.length || !props.length))) {
|
|
options = source;
|
|
source = object;
|
|
object = this;
|
|
methodNames = baseFunctions(source, keys(source));
|
|
}
|
|
var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
|
|
isFunc = isFunction(object);
|
|
|
|
arrayEach(methodNames, function(methodName) {
|
|
var func = source[methodName];
|
|
object[methodName] = func;
|
|
if (isFunc) {
|
|
object.prototype[methodName] = function() {
|
|
var chainAll = this.__chain__;
|
|
if (chain || chainAll) {
|
|
var result = object(this.__wrapped__),
|
|
actions = result.__actions__ = copyArray(this.__actions__);
|
|
|
|
actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
|
|
result.__chain__ = chainAll;
|
|
return result;
|
|
}
|
|
return func.apply(object, arrayPush([this.value()], arguments));
|
|
};
|
|
}
|
|
});
|
|
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* This method returns `undefined`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 2.3.0
|
|
* @category Util
|
|
* @example
|
|
*
|
|
* _.times(2, _.noop);
|
|
* // => [undefined, undefined]
|
|
*/
|
|
function noop() {
|
|
// No operation performed.
|
|
}
|
|
|
|
/**
|
|
* Creates a function that returns the value at `path` of a given object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 2.4.0
|
|
* @category Util
|
|
* @param {Array|string} path The path of the property to get.
|
|
* @returns {Function} Returns the new accessor function.
|
|
* @example
|
|
*
|
|
* var objects = [
|
|
* { 'a': { 'b': 2 } },
|
|
* { 'a': { 'b': 1 } }
|
|
* ];
|
|
*
|
|
* _.map(objects, _.property('a.b'));
|
|
* // => [2, 1]
|
|
*
|
|
* _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
|
|
* // => [1, 2]
|
|
*/
|
|
function property(path) {
|
|
return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of numbers (positive and/or negative) progressing from
|
|
* `start` up to, but not including, `end`. A step of `-1` is used if a negative
|
|
* `start` is specified without an `end` or `step`. If `end` is not specified,
|
|
* it's set to `start` with `start` then set to `0`.
|
|
*
|
|
* **Note:** JavaScript follows the IEEE-754 standard for resolving
|
|
* floating-point values which can produce unexpected results.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Util
|
|
* @param {number} [start=0] The start of the range.
|
|
* @param {number} end The end of the range.
|
|
* @param {number} [step=1] The value to increment or decrement by.
|
|
* @returns {Array} Returns the range of numbers.
|
|
* @see _.inRange, _.rangeRight
|
|
* @example
|
|
*
|
|
* _.range(4);
|
|
* // => [0, 1, 2, 3]
|
|
*
|
|
* _.range(-4);
|
|
* // => [0, -1, -2, -3]
|
|
*
|
|
* _.range(1, 5);
|
|
* // => [1, 2, 3, 4]
|
|
*
|
|
* _.range(0, 20, 5);
|
|
* // => [0, 5, 10, 15]
|
|
*
|
|
* _.range(0, -4, -1);
|
|
* // => [0, -1, -2, -3]
|
|
*
|
|
* _.range(1, 4, 0);
|
|
* // => [1, 1, 1]
|
|
*
|
|
* _.range(0);
|
|
* // => []
|
|
*/
|
|
var range = createRange();
|
|
|
|
/**
|
|
* This method returns a new empty array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.13.0
|
|
* @category Util
|
|
* @returns {Array} Returns the new empty array.
|
|
* @example
|
|
*
|
|
* var arrays = _.times(2, _.stubArray);
|
|
*
|
|
* console.log(arrays);
|
|
* // => [[], []]
|
|
*
|
|
* console.log(arrays[0] === arrays[1]);
|
|
* // => false
|
|
*/
|
|
function stubArray() {
|
|
return [];
|
|
}
|
|
|
|
/**
|
|
* This method returns `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.13.0
|
|
* @category Util
|
|
* @returns {boolean} Returns `false`.
|
|
* @example
|
|
*
|
|
* _.times(2, _.stubFalse);
|
|
* // => [false, false]
|
|
*/
|
|
function stubFalse() {
|
|
return false;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Computes the maximum value of `array`. If `array` is empty or falsey,
|
|
* `undefined` is returned.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Math
|
|
* @param {Array} array The array to iterate over.
|
|
* @returns {*} Returns the maximum value.
|
|
* @example
|
|
*
|
|
* _.max([4, 2, 8, 6]);
|
|
* // => 8
|
|
*
|
|
* _.max([]);
|
|
* // => undefined
|
|
*/
|
|
function max(array) {
|
|
return (array && array.length)
|
|
? baseExtremum(array, identity, baseGt)
|
|
: undefined;
|
|
}
|
|
|
|
/**
|
|
* Computes the minimum value of `array`. If `array` is empty or falsey,
|
|
* `undefined` is returned.
|
|
*
|
|
* @static
|
|
* @since 0.1.0
|
|
* @memberOf _
|
|
* @category Math
|
|
* @param {Array} array The array to iterate over.
|
|
* @returns {*} Returns the minimum value.
|
|
* @example
|
|
*
|
|
* _.min([4, 2, 8, 6]);
|
|
* // => 2
|
|
*
|
|
* _.min([]);
|
|
* // => undefined
|
|
*/
|
|
function min(array) {
|
|
return (array && array.length)
|
|
? baseExtremum(array, identity, baseLt)
|
|
: undefined;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// Add methods that return wrapped values in chain sequences.
|
|
lodash.assignIn = assignIn;
|
|
lodash.chain = chain;
|
|
lodash.compact = compact;
|
|
lodash.constant = constant;
|
|
lodash.debounce = debounce;
|
|
lodash.delay = delay;
|
|
lodash.filter = filter;
|
|
lodash.flatten = flatten;
|
|
lodash.groupBy = groupBy;
|
|
lodash.intersection = intersection;
|
|
lodash.iteratee = iteratee;
|
|
lodash.keys = keys;
|
|
lodash.keysIn = keysIn;
|
|
lodash.map = map;
|
|
lodash.memoize = memoize;
|
|
lodash.merge = merge;
|
|
lodash.mixin = mixin;
|
|
lodash.negate = negate;
|
|
lodash.omit = omit;
|
|
lodash.pick = pick;
|
|
lodash.property = property;
|
|
lodash.range = range;
|
|
lodash.reject = reject;
|
|
lodash.reverse = reverse;
|
|
lodash.sortBy = sortBy;
|
|
lodash.tap = tap;
|
|
lodash.throttle = throttle;
|
|
lodash.thru = thru;
|
|
lodash.toArray = toArray;
|
|
lodash.toPlainObject = toPlainObject;
|
|
lodash.union = union;
|
|
lodash.uniq = uniq;
|
|
lodash.values = values;
|
|
lodash.without = without;
|
|
|
|
// Add aliases.
|
|
lodash.extend = assignIn;
|
|
|
|
// Add methods to `lodash.prototype`.
|
|
mixin(lodash, lodash);
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// Add methods that return unwrapped values in chain sequences.
|
|
lodash.clone = clone;
|
|
lodash.eq = eq;
|
|
lodash.every = every;
|
|
lodash.find = find;
|
|
lodash.findIndex = findIndex;
|
|
lodash.forEach = forEach;
|
|
lodash.get = get;
|
|
lodash.hasIn = hasIn;
|
|
lodash.head = head;
|
|
lodash.identity = identity;
|
|
lodash.invoke = invoke;
|
|
lodash.isArguments = isArguments;
|
|
lodash.isArray = isArray;
|
|
lodash.isArrayLike = isArrayLike;
|
|
lodash.isArrayLikeObject = isArrayLikeObject;
|
|
lodash.isBuffer = isBuffer;
|
|
lodash.isEmpty = isEmpty;
|
|
lodash.isEqual = isEqual;
|
|
lodash.isFunction = isFunction;
|
|
lodash.isLength = isLength;
|
|
lodash.isMap = isMap;
|
|
lodash.isObject = isObject;
|
|
lodash.isObjectLike = isObjectLike;
|
|
lodash.isPlainObject = isPlainObject;
|
|
lodash.isSet = isSet;
|
|
lodash.isString = isString;
|
|
lodash.isSymbol = isSymbol;
|
|
lodash.isTypedArray = isTypedArray;
|
|
lodash.last = last;
|
|
lodash.max = max;
|
|
lodash.min = min;
|
|
lodash.stubArray = stubArray;
|
|
lodash.stubFalse = stubFalse;
|
|
lodash.noop = noop;
|
|
lodash.now = now;
|
|
lodash.reduce = reduce;
|
|
lodash.toFinite = toFinite;
|
|
lodash.toInteger = toInteger;
|
|
lodash.toNumber = toNumber;
|
|
lodash.toString = toString;
|
|
|
|
// Add aliases.
|
|
lodash.each = forEach;
|
|
lodash.first = head;
|
|
|
|
mixin(lodash, (function() {
|
|
var source = {};
|
|
baseForOwn(lodash, function(func, methodName) {
|
|
if (!hasOwnProperty.call(lodash.prototype, methodName)) {
|
|
source[methodName] = func;
|
|
}
|
|
});
|
|
return source;
|
|
}()), { 'chain': false });
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* The semantic version number.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type {string}
|
|
*/
|
|
lodash.VERSION = VERSION;
|
|
|
|
// Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
|
|
arrayEach(['drop', 'take'], function(methodName, index) {
|
|
LazyWrapper.prototype[methodName] = function(n) {
|
|
n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
|
|
|
|
var result = (this.__filtered__ && !index)
|
|
? new LazyWrapper(this)
|
|
: this.clone();
|
|
|
|
if (result.__filtered__) {
|
|
result.__takeCount__ = nativeMin(n, result.__takeCount__);
|
|
} else {
|
|
result.__views__.push({
|
|
'size': nativeMin(n, MAX_ARRAY_LENGTH),
|
|
'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
|
|
});
|
|
}
|
|
return result;
|
|
};
|
|
|
|
LazyWrapper.prototype[methodName + 'Right'] = function(n) {
|
|
return this.reverse()[methodName](n).reverse();
|
|
};
|
|
});
|
|
|
|
// Add `LazyWrapper` methods that accept an `iteratee` value.
|
|
arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
|
|
var type = index + 1,
|
|
isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
|
|
|
|
LazyWrapper.prototype[methodName] = function(iteratee) {
|
|
var result = this.clone();
|
|
result.__iteratees__.push({
|
|
'iteratee': getIteratee(iteratee, 3),
|
|
'type': type
|
|
});
|
|
result.__filtered__ = result.__filtered__ || isFilter;
|
|
return result;
|
|
};
|
|
});
|
|
|
|
// Add `LazyWrapper` methods for `_.head` and `_.last`.
|
|
arrayEach(['head', 'last'], function(methodName, index) {
|
|
var takeName = 'take' + (index ? 'Right' : '');
|
|
|
|
LazyWrapper.prototype[methodName] = function() {
|
|
return this[takeName](1).value()[0];
|
|
};
|
|
});
|
|
|
|
// Add `LazyWrapper` methods for `_.initial` and `_.tail`.
|
|
arrayEach(['initial', 'tail'], function(methodName, index) {
|
|
var dropName = 'drop' + (index ? '' : 'Right');
|
|
|
|
LazyWrapper.prototype[methodName] = function() {
|
|
return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
|
|
};
|
|
});
|
|
|
|
LazyWrapper.prototype.compact = function() {
|
|
return this.filter(identity);
|
|
};
|
|
|
|
LazyWrapper.prototype.find = function(predicate) {
|
|
return this.filter(predicate).head();
|
|
};
|
|
|
|
LazyWrapper.prototype.findLast = function(predicate) {
|
|
return this.reverse().find(predicate);
|
|
};
|
|
|
|
LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
|
|
if (typeof path == 'function') {
|
|
return new LazyWrapper(this);
|
|
}
|
|
return this.map(function(value) {
|
|
return baseInvoke(value, path, args);
|
|
});
|
|
});
|
|
|
|
LazyWrapper.prototype.reject = function(predicate) {
|
|
return this.filter(negate(getIteratee(predicate)));
|
|
};
|
|
|
|
LazyWrapper.prototype.slice = function(start, end) {
|
|
start = toInteger(start);
|
|
|
|
var result = this;
|
|
if (result.__filtered__ && (start > 0 || end < 0)) {
|
|
return new LazyWrapper(result);
|
|
}
|
|
if (start < 0) {
|
|
result = result.takeRight(-start);
|
|
} else if (start) {
|
|
result = result.drop(start);
|
|
}
|
|
if (end !== undefined) {
|
|
end = toInteger(end);
|
|
result = end < 0 ? result.dropRight(-end) : result.take(end - start);
|
|
}
|
|
return result;
|
|
};
|
|
|
|
LazyWrapper.prototype.takeRightWhile = function(predicate) {
|
|
return this.reverse().takeWhile(predicate).reverse();
|
|
};
|
|
|
|
LazyWrapper.prototype.toArray = function() {
|
|
return this.take(MAX_ARRAY_LENGTH);
|
|
};
|
|
|
|
// Add `LazyWrapper` methods to `lodash.prototype`.
|
|
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
|
|
var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
|
|
isTaker = /^(?:head|last)$/.test(methodName),
|
|
lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
|
|
retUnwrapped = isTaker || /^find/.test(methodName);
|
|
|
|
if (!lodashFunc) {
|
|
return;
|
|
}
|
|
lodash.prototype[methodName] = function() {
|
|
var value = this.__wrapped__,
|
|
args = isTaker ? [1] : arguments,
|
|
isLazy = value instanceof LazyWrapper,
|
|
iteratee = args[0],
|
|
useLazy = isLazy || isArray(value);
|
|
|
|
var interceptor = function(value) {
|
|
var result = lodashFunc.apply(lodash, arrayPush([value], args));
|
|
return (isTaker && chainAll) ? result[0] : result;
|
|
};
|
|
|
|
if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
|
|
// Avoid lazy use if the iteratee has a "length" value other than `1`.
|
|
isLazy = useLazy = false;
|
|
}
|
|
var chainAll = this.__chain__,
|
|
isHybrid = !!this.__actions__.length,
|
|
isUnwrapped = retUnwrapped && !chainAll,
|
|
onlyLazy = isLazy && !isHybrid;
|
|
|
|
if (!retUnwrapped && useLazy) {
|
|
value = onlyLazy ? value : new LazyWrapper(this);
|
|
var result = func.apply(value, args);
|
|
result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
|
|
return new LodashWrapper(result, chainAll);
|
|
}
|
|
if (isUnwrapped && onlyLazy) {
|
|
return func.apply(this, args);
|
|
}
|
|
result = this.thru(interceptor);
|
|
return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
|
|
};
|
|
});
|
|
|
|
// Add `Array` methods to `lodash.prototype`.
|
|
arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
|
|
var func = arrayProto[methodName],
|
|
chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
|
|
retUnwrapped = /^(?:pop|shift)$/.test(methodName);
|
|
|
|
lodash.prototype[methodName] = function() {
|
|
var args = arguments;
|
|
if (retUnwrapped && !this.__chain__) {
|
|
var value = this.value();
|
|
return func.apply(isArray(value) ? value : [], args);
|
|
}
|
|
return this[chainName](function(value) {
|
|
return func.apply(isArray(value) ? value : [], args);
|
|
});
|
|
};
|
|
});
|
|
|
|
// Map minified method names to their real names.
|
|
baseForOwn(LazyWrapper.prototype, function(func, methodName) {
|
|
var lodashFunc = lodash[methodName];
|
|
if (lodashFunc) {
|
|
var key = (lodashFunc.name + ''),
|
|
names = realNames[key] || (realNames[key] = []);
|
|
|
|
names.push({ 'name': methodName, 'func': lodashFunc });
|
|
}
|
|
});
|
|
|
|
realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
|
|
'name': 'wrapper',
|
|
'func': undefined
|
|
}];
|
|
|
|
// Add methods to `LazyWrapper`.
|
|
LazyWrapper.prototype.clone = lazyClone;
|
|
LazyWrapper.prototype.reverse = lazyReverse;
|
|
LazyWrapper.prototype.value = lazyValue;
|
|
|
|
// Add chain sequence methods to the `lodash` wrapper.
|
|
lodash.prototype.chain = wrapperChain;
|
|
lodash.prototype.commit = wrapperCommit;
|
|
lodash.prototype.next = wrapperNext;
|
|
lodash.prototype.plant = wrapperPlant;
|
|
lodash.prototype.reverse = wrapperReverse;
|
|
lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
|
|
|
|
// Add lazy aliases.
|
|
lodash.prototype.first = lodash.prototype.head;
|
|
|
|
if (symIterator) {
|
|
lodash.prototype[symIterator] = wrapperToIterator;
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
// Some AMD build optimizers, like r.js, check for condition patterns like:
|
|
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
|
|
// Expose Lodash on the global object to prevent errors when Lodash is
|
|
// loaded by a script tag in the presence of an AMD loader.
|
|
// See http://requirejs.org/docs/errors.html#mismatch for more details.
|
|
// Use `_.noConflict` to remove Lodash from the global object.
|
|
root._ = lodash;
|
|
|
|
// Define as an anonymous module so, through path mapping, it can be
|
|
// referenced as the "underscore" module.
|
|
define(function() {
|
|
return lodash;
|
|
});
|
|
}
|
|
// Check for `exports` after `define` in case a build optimizer adds it.
|
|
else if (freeModule) {
|
|
// Export for Node.js.
|
|
(freeModule.exports = lodash)._ = lodash;
|
|
// Export for CommonJS support.
|
|
freeExports._ = lodash;
|
|
}
|
|
else {
|
|
// Export to the global object.
|
|
root._ = lodash;
|
|
}
|
|
}.call(this));
|