grep {$_ if $hash{$_} > 1} sort keys %hash

The '$_ if' is redundant since that is what grep does by default, return $_ if the clause is true. The following works the same way:

grep { $hash{$_} > 1 } sort keys %hash

In reply to Re^2: why use a hash instead of an array by Lotus1
in thread why use a hash instead of an array by DarrenSol

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