Maybe 
my @keys_in_commmon =
  grep $hashref1->{$_}, keys %$hashref2;

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would've sufficed?? If you just have to determine if they have keys in common, 
if( grep $hashref1->{$_}, keys %$hashref2 ) { ... }

[download]
would do the trick...

In reply to Re^4: Common hash keys by massa
in thread Common hash keys by Anonymous Monk

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