From: Paul Stickney <pstickne@...>
Date: 2008-01-16T11:13:10+09:00
Subject: Re: set operations on array of hash

I know this doesn't directly answer your question, but see:

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/51362

Also, check out the follow-up reply.