From: lith <minilith@...>
Date: 2009-11-26T01:59:00+09:00
Subject: Re: Distinct Sets (#225)

>   set_of_sets.divide{|i, j|
>     i.intersect?(j)
>   }

I didn't know the Set#divide method. Interesting.

Here is a graph-based approach:
http://pastie.org/714759

Regards,
Tom