my %hash1;
my %hash2 = (1 => 2,
             3 => 5,
             4 => 2,);

my @keys = keys %hash2;

for (my $i=0; $i<@keys; $i++) {     
    $hash1{"$keys[$i]-$keys[$i]"}=$hash2{$keys[$i]};  
    for (my $j=$i+1; $j<@keys; $j++) {       
        $hash1{"$keys[$i]-$keys[$j]"} = $hash2{$keys[$i]}*$hash2{$keys
+[$j]};  
    }
}

[download]

In reply to Re: Self-Looping over hash - how to remove duplicate by Anonymous Monk
in thread Self-Looping over hash - how to remove duplicate by monkfan

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