实现deepclone的两种方法
方案一：利用现代浏览器支持的JSON对象做一次中转，实现深度克隆。（IE6、IE7不支持原生JSON对象,可载入json2.js补丁来达到兼容）感谢rekey提供此方案。JSON.stringify()与JSON.parse()详细信息请点击这里
var deepClone = function (obj) {
var _tmp,result;
_tmp = JSON.stringify(obj);
result = JSON.parse(_tmp);
return result;
}
var obj1 = {family:{brother:"wangzhipeng",father:"wanglicai",mother:"sunaiyun"},name:"gino",sex:"male",age:"27"};
var obj2 = deepClone(obj1);
obj1.family.brother = "close";
console.log(obj1);
console.log(obj2);
方案二：确定参数类型为object （这里仅指object literal、Array literal）后，复制源对象的键/值到目标对象，否则直接返回源对象。
var deepClone = function fnDeepClone(obj){
var result = typeof obj.splice === 'function'?[]:{},
key;
if (obj && typeof obj === 'object'){
for (key in obj ){
if (obj[key] && typeof obj[key] === 'object'){
result[key] = fnDeepClone(obj[key]);//如果对象的属性值为object的时候，递归调用deepClone，即再把某个值对象复制一份到新的对象的对应值中
}else{
result[key] = obj[key];//如果对象的属性值不为object的时候，直接复制参数对象的每一个键/值到新对象对应的键/值中
}
}
return result;
}
return obj;
}
//test array
var arry1= ["a","b","c","d"];
var arry2 = deepClone(arry1);
arry1.pop();
console.log(arry1);
console.log(arry2);
//test object
var obj1 = {name:"gino",sex:"male",age:27,favorite:"pingpang",family:{brother:"zhipeng",mother:"SunAiyun",father:"WangLicai"}};
var obj2 = deepClone(obj1);
obj1.family.brother = "close";
console.log(obj1);
console.log(obj2);
第二种方法还在学习。