Dear monks,

I have two hashes of key-value pairs of numbers. I want to find out how many of these key-value pairs are the same and different in both hashes (matching in both orientations e.g. key-key and key-value etc).

I have some code sort of working but it only works out which keys are different (below). Can someone help me to extend my code to find out which key-value pairs are the same and where the differences are?

Kind regards. 

my %old_gp = map {$gp1_a[$_] => $gp1_b[$_]} 0 .. $#gp1_a;
my %new_gp = map {$gp2_a[$_] => $gp2_b[$_]} 0 .. $#gp2_a;
                                                                      
+                                                                 
                                                                      
+                                                                 
my @diff=();
foreach (keys %new_gp)  {
        push (@diff, "$_ ")  unless exists $old_gp{$_};
}
                                                                      
+                                                                 
print @diff;

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In reply to comparing key-value pairs of two hashes by Anonymous Monk

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