Question

Does Perl have a build-in function to get the index of an element in an array? Or I need write such a function by myself? [ equivalent to PHP array_search() or JavaScript array.indexOf() ]

Answer 1

use List::Util qw(first);
$idx = first { $array[$_] eq 'whatever' } 0..$#array;

(List::Util is core)

or

use List::MoreUtils qw(firstidx);
$idx = firstidx { $_ eq 'whatever' } @array;

(List::MoreUtils is on CPAN)