Invert the hash, putting keys in anonymous arrays, 

my %hash = {1 => 'One', 2 => 'Two', 3 => 'One'};
my %ihash;
push @{$ihash{$hash{$_}}}, $_ for keys %hash;
print "@{$hash{One}}\n";

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After Compline,
Zaxo

In reply to Re: Getting the keys of identical values in a hash by Zaxo
in thread Getting the keys of identical values in a hash by knsridhar

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