Sha256: a8853412cb454abfafb09df0dd8d6d98b3d6662214bf82c209ad98dcc874b4dd
Contents?: true
Size: 767 Bytes
Versions: 47
Compression:
Stored size: 767 Bytes
Contents
unless Array.method_defined? :repeated_combination
require 'backports/tools/arguments'
require 'backports/1.8.7/array/index'
class Array
# Note: Combinations are not yielded in the same order as MRI.
# This is not a bug; the spec states that the order is implementation dependent
def repeated_combination(num)
return to_enum(:repeated_combination, num) unless block_given?
num = Backports.coerce_to_int(num)
if num <= 0
yield [] if num == 0
else
copy = dup
indices = Array.new(num, 0)
indices[-1] = size
while dec = indices.index{|x| x != 0}
indices.fill indices[dec]-1, 0, dec + 1
yield copy.values_at(*indices)
end
end
self
end
end
end
Version data entries
47 entries across 47 versions & 4 rubygems