in reply to How can I access object data in a user defined sort cmp function?

The <=> can dig into objects and hashes, so you can use something like $a->key->{'other'} <=> $b->key->{'other'}. Proof of concept:
#/usr/bin/perl use warnings; use strict; use Data::Debug; my @things; push @things, Thing->new() for (1..10); debug @things; my @sorted = sort { $a->key->{'other'} <=> $b->key->{'other'} } @thing +s; debug @sorted; package Thing; sub new { return bless { key => { other => int(rand(42))} }, 'Thing'; +} sub key { return shift->{'key'}; } 1;
I hope that is helpful :)