Last Modified
2015-06-10 17:35:29 -0700
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Copyright © 2002-2008 Akinori MUSHA <>

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 17051 2008-06-09 09:20:43Z knu $


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.

The method to_set is added to Enumerable for convenience.

See the Set class for an example of usage.

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