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54 lines
1.3 KiB
ReStructuredText
54 lines
1.3 KiB
ReStructuredText
string-sub - extract substrings
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===============================
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Synopsis
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--------
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.. BEGIN SYNOPSIS
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.. synopsis::
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string sub [(-s | --start) START] [(-e | --end) END] [(-l | --length) LENGTH]
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[-q | --quiet] [STRING ...]
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.. END SYNOPSIS
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Description
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-----------
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.. BEGIN DESCRIPTION
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``string sub`` prints a substring of each string argument. The start/end of the substring can be specified with **-s**/**-e** or **--start**/**--end** followed by a 1-based index value. Positive index values are relative to the start of the string and negative index values are relative to the end of the string. The default start value is 1. The length of the substring can be specified with **-l** or **--length**. If the length or end is not specified, the substring continues to the end of each STRING. Exit status: 0 if at least one substring operation was performed, 1 otherwise. **--length** is mutually exclusive with **--end**.
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.. END DESCRIPTION
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Examples
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--------
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.. BEGIN EXAMPLES
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::
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>_ string sub --length 2 abcde
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ab
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>_ string sub -s 2 -l 2 abcde
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bc
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>_ string sub --start=-2 abcde
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de
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>_ string sub --end=3 abcde
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abc
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>_ string sub -e -1 abcde
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abcd
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>_ string sub -s 2 -e -1 abcde
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bcd
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>_ string sub -s -3 -e -2 abcde
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c
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.. END EXAMPLES
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