Here's an optmization that only executes the regexp once per string:

@sorted_keys = map { $_->[0] }
               sort { $a->[1] <=> $b->[1] }
               map { $etcpw->{$_} =~ /:(\d+)/; [ $_, $1 ] }
               keys %{$etcpw};

print "$etcpw->{$_}\n"
   foreach @sorted_keys;

[download]

We can even drop a step:

print "$etcpw->{$_->[0]}\n"
   foreach
      sort { $a->[1] <=> $b->[1] }
      map { $etcpw->{$_} =~ /:(\d+)/; [ $_, $1 ] }
      keys %{$etcpw};

[download]

In reply to Re^3: Hash sorting (by value) woes by ikegami
in thread Hash sorting (by value) woes by sschneid

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