class Enumerator
Constants
- NOVALUE
Public Class Methods
generate(initial = NOVALUE) { || ... }
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# File lib/enumerator_generate.rb, line 4 def self.generate(initial = NOVALUE) raise ArgumentError, "No block given" unless block_given? Enumerator.new do |y| val = initial == NOVALUE ? yield() : initial y << val loop do val = yield(val) y << val end end end