用PHP实现一个双向队列-php手册-PHP中文网

用PHP实现一个双向队列

php中文网

发布： 2016-06-13 09:37:28

原创

879人浏览过

1.简介

deque，全名double-ended queue，是一种具有队列和栈的性质的数据结构。双端队列中的元素可以从两端弹出，其限定插入和删除操作在表的两端进行。双向队列（双端队列）就像是一个队列，但是你可以在任何一端添加或移除元素。

参考：http://zh.wikipedia.org/zh-cn/%E5%8F%8C%E7%AB%AF%E9%98%9F%E5%88%97

2.PHP实现代码

PHPShops多用户商城系统

随着电子商务模式更加多样化，企业和个人的迫切需求，PHPShops多用户商城系统正可以为其提供专业的电子商务解决方案。社区化电子商务，主要面向行业类和地方门户类站点。 PHPShops多用户商城系统（简称PHPShops）是基于电子商务的一套平台交易系统，它采用目前最流行网站建设工具PHP＋MYSQL，实现模版分离技术，通过HTML交互式网页技术来实行客户端与服务器端的交流。无论在

查看详情

<span class</span><span  DoubleQueue  
{ 
    </span><span public</span> <span $queue</span> = <span array</span><span (); 
    
    </span><span /*</span><span *（尾部）入队  *</span><span */</span> 
    <span public</span> <span function</span> push(<span $value</span><span )  
    { 
        </span><span return</span> <span array_push</span>(<span $this</span>->queue,<span $value</span><span ); 
    } 
    </span><span /*</span><span *（尾部）出队*</span><span */</span> 
    <span public</span> <span function</span><span  pop()  
    { 
        </span><span return</span> <span array_pop</span>(<span $this</span>-><span queue); 
    } 
    </span><span /*</span><span *（头部）入队*</span><span */</span> 
    <span public</span> <span function</span> enq(<span $value</span><span )  
    { 
        </span><span return</span> <span array_unshift</span>(<span $this</span>->queue,<span $value</span><span ); 
    } 
    </span><span /*</span><span *（头部）出队*</span><span */</span> 
    <span public</span> <span function</span><span  deq()  
    { 
        </span><span return</span> <span array_shift</span>(<span $this</span>-><span queue); 
    } 
    </span><span /*</span><span *清空队列*</span><span */</span> 
    <span public</span> <span function</span><span  empty()  
    { 
        </span><span unset</span>(<span $this</span>-><span queue);
    } 
    
    </span><span /*</span><span *获取列头*</span><span */</span>
    <span public</span> <span function</span><span  first()  
    { 
        </span><span return</span> <span reset</span>(<span $this</span>-><span queue); 
    } 

    </span><span /*</span><span * 获取列尾 *</span><span */</span>
    <span public</span> <span function</span><span  last()  
    { 
        </span><span return</span> <span end</span>(<span $this</span>-><span queue); 
    }

    </span><span /*</span><span * 获取长度 *</span><span */</span>
    <span public</span> <span function</span><span  length()  
    { 
        </span><span return</span> <span count</span>(<span $this</span>-><span queue); 
    }
    
} </span>

登录后复制

立即学习“PHP免费学习笔记（深入）”；