Sha256: 8dbf05fb54f4644add338d245c1c3fdfdb0fd1b472ab6d4502a5935a98d1d681
Contents?: true
Size: 930 Bytes
Versions: 11
Compression:
Stored size: 930 Bytes
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]]
#
#--
# TODO Make a more efficient version just for Array (?)
#++
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
11 entries across 11 versions & 1 rubygems