Sha256: 425a731b09ed9523932b2cb276ad1af6ecdcc82189035aa2803c922f08876a3e
Contents?: true
Size: 757 Bytes
Versions: 26
Compression:
Stored size: 757 Bytes
Contents
unless Array.method_defined? :repeated_combination
require 'backports/tools'
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
26 entries across 26 versions & 2 rubygems