This works perfect although I don't understand yet 100% how the Schwartzian transform works. Their is one small problem that I have with the code is that it should look for all leading characters to be split because now it substr only one but it could be more. (CR30-1 for example) So I tried to modify the code but no success. 
sub sorted { 
    return map { $_->[0] }
        sort { 
            $a->[1] <=> $b->[1] ||
            $a->[2] <=> $b->[2]
        } map { [ $_, split("-", s/^[A-Z]+//) ] } @_;
}

foreach my $key (sorted(keys %keys)) {
    print "'$key' => ", $keys{$key}, "\n";
    foreach my $subkey (sorted(keys %{$keys{$key}})) {
        print "   '$subkey' => $keys{$key}->{$subkey}\n";
    }
}

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In reply to Re: Re: How to sort hash tables alpha-numeric by juo
in thread How to sort hash tables alpha-numeric by juo

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