From: Gregory Seidman <gsslist+ruby@...>
Date: 2006-11-29T23:33:54+09:00
Subject: Re: Array#group_by

On Wed, Nov 29, 2006 at 10:55:37PM +0900, Gareth Adams wrote:
} I posted this on the Rails list, but then I realised it would make more sense
} over here:
} 
} -------
} 
} Just thought I'd share a function which has been really useful to me, for 2 
} reasons
} 
} 1) It could easily help someone else
} 2) People might be able to make it work better or point out where it's not 
} optimal

See
http://redcorundum.blogspot.com/2006/06/enumerablebucketby-and-uniqby-and.html
for a post of mine from June that covers that, and more.

--Greg