require 'facet/enumerable/cross'

module Enumerable

  # Operator alias for cross-product.
  #
  #   a = [1,2] ** [4,5]
  #   a  #=> [[1, 4],[1, 5],[2, 4],[2, 5]]
  #
  def **(enum)
    Enumerable.cross(self, enum)
  end

end



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

  require 'test/unit'

  class TCEnumerable < Test::Unit::TestCase

    def test_op_pow
      a = [1,2,3] ** [4,5,6]
      assert_equal( [[1, 4],[1, 5],[1, 6],[2, 4],[2, 5],[2, 6],[3, 4],[3, 5],[3, 6]], a )
    end

  end

=end