03-lottery.rb

  def draw n=6
    to_enum(__method__) unless block_given?
    draw_all(n).each do |number|
      break unless number
      yield number
    end
  end

  def draw_sorted n=6
    to_enum(__method__) unless block_given?
    draw(n).to_a.sort.each { |number| yield number }
  end