Copyright © 2002-2008 Akinori MUSHA <knu@iDaemons.org>
Documentation by Akinori MUSHA and Gavin Sinclair.
All rights reserved. You can redistribute and/or modify it under the same terms as Ruby.
$Id: set.rb 34533 2012-02-10 08:28:48Z naruse $
This library provides the Set class, which deals with a collection of unordered values with no duplicates. It is a hybrid of Array's intuitive inter-operation facilities and Hash's fast lookup. If you need to keep values ordered, use the SortedSet class.
to_set is added to Enumerable for convenience.