js队列的实现问题

时间:2023-02-12 18:06:43

所谓队列就是排队的序列问题,有出有进,比如在银行排队办理业务,一般都是前一个办理完成后下一个自动进入队列

<script>  /*

* 模拟队列

*/

var Qu ={};

//构造函数

Qu.Queue = function (len) {

this.capacity = len;        //队列最大容量

this.list = new Array();    //队列数据

};

//入队

Qu.Queue.prototype.enqueue = function (data) {

if (data == null) return;

if(this.list.length>=this.capacity)

{

this.list.remove(0);

}

this.list.push(data);

};

//出队

Qu.Queue.prototype.dequeue = function () {

if (this.list == null) return;

this.list.remove(0);

};

//队列长度

Qu.Queue.prototype.size = function () {

if (this == null) return;

return this.list.length;

};

//队列是否空

Qu.Queue.prototype.isEmpty = function () {

if (this == null|this.list==null) return false;

return this.list.length>0;

};

//对象数组扩展remove

Array.prototype.remove = function(dx) {

if (isNaN(dx) || dx > this.length) {

return false;

}

for (var i = 0, n = 0; i < this.length; i++) {

if (this[i] != this[dx]) {

this[n++] = this[i]

}

}

this.length -= 1

}

  

调用例子:

//队列初始化

var queue = new Qu.Queue(10);

queue.enqueue(1);

queue.enqueue(2);

queue.enqueue(3); </script>

/*

* 模拟队列

*/

var Qu ={};

//构造函数

Qu.Queue = function (len) {

this.capacity = len;        //队列最大容量

this.list = new Array();    //队列数据

};

//入队

Qu.Queue.prototype.enqueue = function (data) {

if (data == null) return;

if(this.list.length>=this.capacity)

{

this.list.remove(0);

}

this.list.push(data);

};

//出队

Qu.Queue.prototype.dequeue = function () {

if (this.list == null) return;

this.list.remove(0);

};

//队列长度

Qu.Queue.prototype.size = function () {

if (this == null) return;

return this.list.length;

};

//队列是否空

Qu.Queue.prototype.isEmpty = function () {

if (this == null|this.list==null) return false;

return this.list.length>0;

};

?

//对象数组扩展remove

Array.prototype.remove = function(dx) {

if (isNaN(dx) || dx > this.length) {

return false;

}

for (var i = 0, n = 0; i < this.length; i++) {

if (this[i] != this[dx]) {

this[n++] = this[i]

}

}

this.length -= 1

}

  

调用例子:

//队列初始化

var queue = new Qu.Queue(10);

queue.enqueue(1);

queue.enqueue(2);

queue.enqueue(3);