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bd18736ee5
Using bare vars is more efficient because it makes the builtin `math` expression cache more useful. That's because if you prefix each var with a dollar-sign then the fish parser expands it before `math` is run. Something like `math x + 1` can be cached since the expression is the same each time it is run. But if you do `math $x + 1` and x==1 then you're effectively executing `math 1 + 1`. And if x==2 the next time then you're running `math 2 + 1`. Which makes the expression cache much less effective.
47 lines
1.0 KiB
Fish
47 lines
1.0 KiB
Fish
function contains_seq --description 'Return true if array contains a sequence'
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set -l printnext
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switch $argv[1]
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case --printnext
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set printnext[1] 1
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set -e argv[1]
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end
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set -l pattern
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set -l string
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set -l dest pattern
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for i in $argv
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if test "$i" = --
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set dest string
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continue
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end
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set $dest $$dest $i
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end
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set -l nomatch 1
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set -l i 1
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for s in $string
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if set -q printnext[2]
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return 0
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end
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if test "$s" = "$pattern[$i]"
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set -e nomatch[1]
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set i (math i + 1)
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if not set -q pattern[$i]
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if set -q printnext[1]
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set printnext[2] 1
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continue
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end
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return 0
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end
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else
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if not set -q nomatch[1]
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set nomatch 1
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set i 1
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end
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end
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end
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if set -q printnext[1]
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echo ''
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end
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set -q printnext[2]
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end
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