enum.rb

class Enumerator
  class Do < BasicObject
    def initialize(enum)
      @enum = enum
    end

    def method_missing(meth, *args, &blk)
      @enum.each do |x|
        x.send(meth, *args, &blk)
      end
    end
  end

  def do
    Do.new(self)
  end
end