RosettaCodeData/Task/Left-factorials/Ruby/left-factorials-1.rb

left_fact = Enumerator.new do |y|
  f, lf = 1, 0
  1.step do |n|
    y  << lf #yield left_factorial
    lf += f
    f  *= n
  end
end
Update all new Tasks 2015-02-20 09:02:09 -05:00			`left_fact = Enumerator.new do \|y\|`
June 2018 Update 2018-06-22 20:57:24 +00:00			`f, lf = 1, 0`
			`1.step do \|n\|`
Update all new Tasks 2015-02-20 09:02:09 -05:00			`y << lf #yield left_factorial`
			`lf += f`
			`f *= n`
			`end`
			`end`