Sha256: 08a661c17cee189b648567098619e31dc1204659006d7c22198fb58396b10ec2
Contents?: true
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Contents
#--
# Cross product adapted from code by Michael Neuman.
#++
require 'facet/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
9 entries across 9 versions & 1 rubygems