Last Modified
2010-09-08 13:01:46 +0900
Requires

Description

Equitable

This mixin provides methods of equality based on a single # method which must return a list of accessors used as the identity keys.

It also provides a “shortcut” for creating the # method based on given accessors and returns the Equitable module for inclusion.

  include Equitable(:a, :b)

is equivalent to including a module containing:

  def ==(other)
    self.a == other.a && self.b == other.b
  end

  def eql?(other)
    self.a.eql?(other.a) && self.b.eql?(other.b)
  end

  def hash()
    self.a.hash ^ self.b.hash
  end

Authors

Copying

Copyright © 2004 Thomas Sawyer

Ruby License

This module is free software. You may use, modify, and/or redistribute this software under the same terms as Ruby.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.