I have a requirement to compare two hashes, just the keys, not values. I came up with the following, but I was wondering (in the spirit of TIMTOWDI) whether there was a neater and/or more efficient way of doing it. 
sub compare_hash_keys {
        my ($h1,$h2) = @_;

        my @k1 = sort keys %$h1;
        my @k2 = sort keys %$h2;

        return @k2 - @k1 if @k1 <=> @k2;
        for (0..$#k1) {
                return $k1[$_] cmp $k2[$_] if $k1[$_] cmp $k2[$_];
        }

        0;
}

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This could turn into a golf exercise I suppose.

In reply to Comparing all keys in a hash by rinceWind

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