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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JavaScript中Java式的类继承</title>
</head>
<script type="text/javascript" src="../common/extends.js"></script>
<script type="text/javascript">
//一个用以定义简单类的函数
function defineClass(constructor,// 用以设置实例的属性的函数
methods, //实例的方法，复制至原型中
static) //类属性，复制至构造函数中
{
if(methods) extend(constructor.prototype,methods);
if(static) extend(constructor,static);
return constructor;
}
//这是Range类的另一实现
var SimpleRange = defineClass(function(f,t) {this.f = f; this.t = t;},
{
includes: function(x) {return this.f = x && x <= this.t; },
toString: function(){ return this.f + "..." + this.t; }
},
{ upto: function(t) { return new SimpleRange(o,t);}
});
var s = new SimpleRange(1,3);
console.log(s.includes(2));
console.log(s.includes(4));
</script>
<body>
</body>
</html>