キュー自作しない

queue1.rb

#: coding: utf-8

class Queue
  def initialize()
    @queue ||= []
  end
  
  def get()
    return nil if @queue.empty?
    return @queue.shift()
  end
  
  def put(item)
    @queue.push(item)
  end
end


def main(argv)
  max = 5
  queue = Queue.new()
  0.upto(max - 1) {|n|
    queue.put(n)
  }
  
  0.upto(max -1) {|n|
    puts queue.get()
  }
end

main(ARGV)

=begin
>ruby queue1.rb
0
1
2
3
4

=end