(() => {
    function copyObj(obj) {
        var copyObj = {};
        for (let key of Object.keys(obj)) {
            //引用类型
            if (obj[key] instanceof Object) {
                let toString = Object.prototype.toString;
                let objtype = toString.call(obj[key])
                let objvalue = obj[key].toString();
                /***
                 * 
                 * 对于几种特殊的 引用类型需要额外处理下,Date 类型, 正则类型等. 
                 * 
                 * Math 类型,不需要处理, 因为 Math 属于 global 类型的(属于设计模式中的单体模型).
                 * 
                 * null undefined 类型可以不用处理,是因为,for...of 循环 可处理,不会像 forin,forEach 跳过.
                 * 
                 * toString.call(new Date); // [object Date] 
                 * toString.call(new String); // [object String] 
                 * toString.call(Math); // [object Math] //Since JavaScript 1.8.5 
                 * toString.call(undefined); // [object Undefined] 
                 * toString.call(null); // [object Null]
                 * 
                 */
                if (objtype.indexOf("Date") > -1) {
                    copyObj[key] = new Date(objvalue);
                }
                if (objtype.indexOf("String") > -1) {
                    copyObj[key] = new String(objvalue);
                }
                if (objtype.indexOf("RegExp")) {
                    copyObj[key] = new RegExp(objvalue);
                }
                /***
                 * Math 是单体方法,静态方法.设计模式中的单利模型.只能直接调引用.
                 * 其实可以不用在这里单独列出来,下面也会处理:)
                 * */
                if (objtype.indexOf("Math") > -1) {
                    copyObj[key] = obj[key];
                }
                /**递归调用
                 * 
                 * copyObj(obj[key])
                 * 
                 * 再或者
                 * arguments.callee(obj[key]);
                 * 
                 **/
                arguments.callee(obj[key]);
            }
            copyObj[key]=obj[key];
        }
        return copyObj;
    }
    var wanglinzhizhiskillstack = {
        name: "wanglinzhizhi",
        sayHello: function () {
            console.log("hi , I'm " + this.name)
        },
        fullstack: {
            ES6: {
                JavaScrip: "80%",
                ES6: "80%"
            },
            HTML: {
                HTML5: '90%',
                HTML: '80%'
            },
            CSS: {
                CSS3: '90%',
                CSS: '80%'
            }
        },
        birthday: new Date("1991/02/08"),
        emailFilter: new RegExp("/^(\w+[_|\.|\_]?)*(\w)+@(\w+[_|\.|\_])*(\w)+\.[a-zA-z]{2,4}$/","gi")
    }
    var wanglinzhizhiCopy = copyObj(wanglinzhizhiskillstack)
    wanglinzhizhiCopy.birthday=new Date("2019/12/12")
    wanglinzhizhiCopy.emailFilter=/\w$/gi;
    console.log(wanglinzhizhiCopy.birthday)
    console.log(wanglinzhizhiskillstack.birthday)
    console.log(wanglinzhizhiskillstack.emailFilter);
    console.log(wanglinzhizhiCopy.emailFilter);
})()

(() => {
    function copyObj(obj) {
        var copyObj = {};
        for (let key of Object.keys(obj)) {
            //引用类型
            if (obj[key] instanceof Object) {
                let toString = Object.prototype.toString;
                let objtype = toString.call(obj[key])
                let objvalue = obj[key].toString();
                /***
                 * 
                 * 对于几种特殊的 引用类型需要额外处理下,Date 类型, 正则类型等. 
                 * 
                 * Math 类型,不需要处理, 因为 Math 属于 global 类型的(属于设计模式中的单体模型).
                 * 
                 * null undefined 类型可以不用处理,是因为,for...of 循环 可处理,不会像 forin,forEach 跳过.
                 * 
                 * toString.call(new Date); // [object Date] 
                 * toString.call(new String); // [object String] 
                 * toString.call(Math); // [object Math] //Since JavaScript 1.8.5 
                 * toString.call(undefined); // [object Undefined] 
                 * toString.call(null); // [object Null]
                 * 
                 */
                if (objtype.indexOf("Date") > -1) {
                    copyObj[key] = new Date(objvalue);
                }
                if (objtype.indexOf("String") > -1) {
                    copyObj[key] = new String(objvalue);
                }
                if (objtype.indexOf("RegExp")) {
                    copyObj[key] = new RegExp(objvalue);
                }
                /***
                 * Math 是单体方法,静态方法.只能直接调引用.
                 * 其实可以不用在这里单独列出来,下面也会处理:)
                 * */
                if (objtype.indexOf("Math") > -1) {
                    copyObj[key] = obj[key];
                }
                /**递归调用
                 * 
                 * copyObj(obj[key])
                 * 
                 * 再或者
                 * arguments.callee(obj[key]);
                 * 
                 **/
                arguments.callee(obj[key]);
            }
            copyObj = Object.create(obj)
        }
        return copyObj;
    }
    var wanglinzhizhiskillstack = {
        name: "wanglinzhizhi",
        sayHello: function () {
            console.log("hi , I'm " + this.name)
        },
        fullstack: {
            ES6: {
                JavaScrip: "80%",
                ES6: "80%"
            },
            HTML: {
                HTML5: '90%',
                HTML: '80%'
            },
            CSS: {
                CSS3: '90%',
                CSS: '80%'
            }
        },
        birthday: new Date("1991/02/08"),
        emailFilter: new RegExp("/^(\w+[_|\.|\_]?)*(\w)+@(\w+[_|\.|\_])*(\w)+\.[a-zA-z]{2,4}$/","gi")
    }
    var wanglinzhizhiCopy = copyObj(wanglinzhizhiskillstack)
    wanglinzhizhiCopy.birthday=new Date("2019/12/12")
    wanglinzhizhiCopy.emailFilter=/\w$/gi;
    console.log(wanglinzhizhiCopy.birthday)
    console.log(wanglinzhizhiskillstack.birthday)
    console.log(wanglinzhizhiskillstack.emailFilter);
    console.log(wanglinzhizhiCopy.emailFilter);
})()