<!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>
