Contents

#--
# Cross product adapted from code by Michael Neuman.
#++
require 'nano/enumerable/self/cross'

module Enumerable

  # The instance level cross-product method.
  #
  #   a = []
  #   [1,2].cross([4,5]){|elem| a << elem }
  #   a  #=> [[1, 4],[1, 5],[2, 4],[2, 5]]
  #
  def cross(*enums, &block)
    Enumerable.cross(self, *enums, &block)
  end

end



#  _____         _
# |_   _|__  ___| |_
#   | |/ _ \/ __| __|
#   | |  __/\__ \ |_
#   |_|\___||___/\__|
#
=begin test

  require 'test/unit'

  class TCEnumerable < Test::Unit::TestCase

    def test_cross
      a = [1,2,3].cross([4,5,6])
      assert_equal( [[1, 4],[1, 5],[1, 6],[2, 4],[2, 5],[2, 6],[3, 4],[3, 5],[3, 6]], a )
      a = []
      [1,2,3].cross([4,5,6]) {|elem| a << elem }
      assert_equal( [[1, 4],[1, 5],[1, 6],[2, 4],[2, 5],[2, 6],[3, 4],[3, 5],[3, 6]], a )
    end

  end

=end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
facets-0.9.0	lib/nano/enumerable/cross.rb