js 模拟队列类

/*
 * 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);