class Enumerator::Yielder

A simple class which allows the construction of Enumerator from a block

def <<(*arg) 

def <<(*arg)
  @final_block.call(*arg)
  self
end

def initialize(&block) 

def initialize(&block)
  @final_block = block
end

def yield(*arg) 

def yield(*arg)
  @final_block.call(*arg)
end