Programming-Idioms

Edit summary for version 28 by skeletonkey:
New Perl implementation by user [skeletonkey]

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2021-08-16, 02:36:12

2021-09-28, 14:40:54

Idiom #222 Find first index of an element in list

Set i to the first index in list items at which the element x can be found, or -1 if items does not contain x.

Set i to the first index in list items at which the element x can be found, or -1 if items does not contain x.

i,x,items

i,x,items

position

position

$i = -1;
$index = 0;
foreach (@items) {
    $i = $index, last if $x eq $items[$index];
    $index++;
}

http://codepad.org/FHaOiLuX

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