Sha256: f9d24331764f206d824f933f4260fc487590c57641003163a9c15113baf8bad9
Contents?: true
Size: 533 Bytes
Versions: 7
Compression:
Stored size: 533 Bytes
Contents
class Array
unless method_defined?(:product) # 1.8.7+
# Provides the cartesian product of two or more arrays.
#
# a = [1,2].product([4,5])
# a #=> [[1, 4],[1, 5],[2, 4],[2, 5]]
#
# CREDIT: Thomas Hafner
def product(*enums)
enums.unshift self
result = [[]]
while [] != enums
t, result = result, []
b, *enums = enums
t.each do |a|
b.each do |n|
result << a + [n]
end
end
end
result
end
end
end
Version data entries
7 entries across 6 versions & 1 rubygems