長さ制限つきのQueue

gistfile1.rb

#長さ制限つきのQueue

class Q

  attr_accessor :q

  def initialize(size)
    @q = []
    @size = size
  end

  def push(data)
    @q.push data
    @q.shift if @q.size > @size
    self
  end

end


q = Q.new(3)
q.push(1).push(2).push(3).push(4)

p q.q