From: Mark Wilson <mwilson13@...>
Date: 2003-06-05T05:32:39+09:00
Subject: More set methods

I've added some additional draft set methods to the Ruby Garden Wiki at

http://www.rubygarden.org/ruby?AdditionalSetMethods

Methods added are:

Two forms of cartesian product (one returning a set of immutable tuples 
and the other returning a set of arrays) -- I plan on looking at using 
the cartesian product method in enum tools to implement these.

'unique_attributes' method -- Deletes objects with duplicate attributes 
from the calling set. Used to deal with a set being able to contain two 
different set objects that have the same elements.

'relation?' method.

'powerset?' method -- Determines if the calling set is a powerset of 
the given set. I'm still working on the 'make_powerset' method.

'make_complement' and 'complement?' methods.

Comments, suggestions, revisions, ideas, derisive laughter, etc. 
welcome.

Regards,

Mark