call_apply.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>call_apply</title>
</head>
<body>
    <script type="text/javascript">
        function dwn(s)
        {
            document.write(s+"<br/>");
        }  

        //定义一个Point类型
        function Point(x,y)
        {
            this.x = x ;
            this.y = y ;
            this.toString = function(){
                return "("+[x,y]+")";
            }
        }  

        //定义一个Vector类型
        function Vector(x,y)
        {
            this.x = x ;
            this.y = y ;
            this.toString = function(){
                return "("+[x,y]+")";
            }
        }  

        //这个函数将传入的参数累加到独享的x,y属性上
        function add(x,y)
        {
            return new this.constructor(this.x+x,this.y+y)
        }  

        var p = new Point(1,2);
        var v = new Vector(-1,2);
        var p1 = add.call(p,3,4);//把add函数作为p的方法调用
        var v1 =add.apply(v,[3,4]);//把add函数作为v的方法调用
        dwn(p1);
        dwn(v1);
    </script>
</body>
</html>
时间： 2024-12-18 02:35:35

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