I feel guilty asking, because this seems like something that would have been asked. But I couldn't find the solution I thought I was looking for. So I come to you.

If I have this bit of code: 
    while (my $d = $ks_sth->fetchrow_hashref()){
        $KP->{$d->{k}}{$d->{v}}++;
    }

[download]
which produces a data structure similar to this: 
$VAR1 = {
          '3094507' => {
                         '2838413' => '22',
                         '2976790' => '33',
                         '539960' => '10',
                         '2152725' => '19',
                         '161546' => '5',
                         '2197572' => '3'
                       },
          '2946464' => {
                         '2952428' => '9',
                         '3913125' => '10',
                         '790014' => '2',
                         '1065575' => '3'
                       },
          '2565888' => {
                         '10538' => '1',
                         '744' => '2'
                       },
        };

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What's an efficient way to find the x (say, top 3) highest values in the "rightmost" numbers?

It's trivial if the structure is $d->{$foo} = $val, but I'm way less clear on how to sort on $val when I'm looking at the values of 'nested' hash refs, such as $d->{$foo}{$bar} = $val.
Any insights or pointers to online examples are appreciated.

In reply to Sorting values of nested hash refs by doran

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