Also, List::MoreUtils has a first_index method: 
use List::MoreUtils;
my $input = 'qux';
my @repo = qw (foo bar qux);

Print List::MoreUtils::first_index {$_ eq $input} @repo;

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In reply to Re^2: Finding index of an entry in an Array by snoopy
in thread Finding index of an entry in an Array by monkfan

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