js34

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

<html>

    <head>

        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

        <script type=text/javascript charset=utf-8>

        (function(){

            //2中函数声明的区别

            add(1,1);

            function add(x,y){

                alert(x+y)

            }

            add(1,2);

            //add2(12,3)//不能调用

            var add2 = function(x,y){

                alert(x+y)

            }

            add2(12,3)

            //传值还是传址，string是基础类型，

            var i = 100;

            var s = "one";

            function add3(i,s){

                i++;

                s+="--"

            }

            alert(i);//100 or 101

            alert(s);//"one"

        })()

        var a = 3;

        var b = [a];

        alert(b instanceof Array);

        alert(b[0]);

        var a = "[1,2,3,4,5]";

        var array = eval(a);//string变数组

        for (var i = 0; i < array.length; i++) {

            alert(array[i])

        }

        //解析成函数，并且调用

        var str = "var show = function(){alert(100)}()";

        eval(str)；

        new person().showName();

        var cat = {};

        Object.getPrototypeOf(cat).name = "MAOMI";

        cat.__proto__.master = "USPCAT.COM";

        var a = {};//空类

        a.__proto__ = person.prototype;

        var b = {};

        b.__proto__ = new person();

        b.__proto__.constructor = b;

        var JSON = {};

        JSON.prototype = {

            toJSONString :function(){

                var outPut = [];

                for(key in this){

                    outPut.push(key+" -- "+this[key])

                }

                return outPut;

            }

        }

        function mixin(receivingClass,givingClass){

            for(methodName in givingClass.prototype){

                //本类中没有这个函数的情况下我在聚合,否则跳过

                    receivingClass.prototype[methodName] = givingClass.prototype[methodName]

            }

        }

        var o = function(){

            this.name = "YUN";

            this.age = 17

        }

        mixin(o,JSON);

        alert(JSON.prototype.toJSONString);

        alert(o.prototype.toJSONString);

        var a = new o();

        alert(a.toJSONString());

        JSON.prototype['toJSONString'] = function(){

            var outPut = [];

            for(key in this){

                outPut.push(key+" ------ "+this[key])

            }

            return outPut;

        }

        mixin(o,JSON);

        alert(JSON.prototype.toJSONString);

        alert(o.prototype.toJSONString);

        alert(a.toJSONString()); 

        </script>

    </head>

    <body>

    </body>

</html>

/**

 * 掺元类

 * 有的适合只需要继承一个类(几个)中的一些函数

 *

 */

(function(){

    //我们准备将要被聚合的函数

    var JSON = {

        toJSONString :function(){

            var outPut = [];

            for(key in this){

                outPut.push(key+" --> "+this[key])

            }

            return outPut;

        }

    };

    /**

     * 聚合函数

     */

    function mixin(receivingClass,givingClass){

        for(methodName in givingClass){

            if(!receivingClass.__proto__[methodName]){ //通过中括号访问json

                receivingClass.__proto__[methodName] = givingClass[methodName]

            }

        }

    }

    var o = {name:"YUN",age:27}

    mixin(o,JSON);

    document.write(o.toJSONString().join(","))

//-------------------------------------------------------------------

    JSON.prototype = {

        toJSONString :function(){

            var outPut = [];

            for(key in this){

                outPut.push(key+" --> "+this[key])

            }

            return outPut;

        }

    }

    //制作聚合函数

    function mixin(receivingClass,givingClass){

        for(methodName in givingClass.prototype){

            //本类中没有这个函数的情况下我在聚合,否则跳过

            if(!receivingClass.prototype[methodName]){

            //传递的是地址

                receivingClass.prototype[methodName] = givingClass.prototype[methodName]

            }

        }

    }

//----------------------------------------------------------

    //var o = {name:"YUN",age:27}

    var o = function(){

        this.name = "YUN";

        this.age = 17

    }

    mixin(o,JSON);

    var a = new o();

    document.write(a.toJSONString().join(","))

})()

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