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>

 

posted @ 2016-07-06 23:47  loewe0202  阅读(195)  评论(0)    收藏  举报