a caching approach to returning all indices of an item in an array: 

perl -wMstrict
-e "my @repo = qw(foo bar qux bar bar zot);  my %repo_indices;
push @{ $repo_indices{$repo[$_]} }, $_ for 0 .. $#repo;
print qq(@{ $repo_indices{bar} });"
1 3 4

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In reply to Re: Finding index of an entry in an Array by Anonymous Monk
in thread Finding index of an entry in an Array by monkfan

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