浅拷贝与递归实现深拷贝封装

佚名 6年前 (2019-05-14) 随笔 706人围观抢沙发百度已收录

 1 function shallowCopy(opj) {
 2     let newOpj = {};
 3     for (let el in opj) {
 4         newOpj[el] = opj[el]
 5     }
 6     return newOpj
 7 }
 8 
 9 shallowCopy({
10     "name": "zhangsan",
11     "age": "18"
12 });
13 
14 function deepCopy(str, newOpj) {
15     //将str深拷贝到newOpj中
16     for (let key in str) {
17         if (typeof str[key] == "object") {
18             newOpj[key] = (str[key] instanceof Array) ? [] : {};
19             deepCopy(str[key], newOpj[key])
20         } else {
21             newOpj[key] = str[key]
22         }
23     }
24     return newOpj
25 }
26 
27 // console.log(deepCopy({
28 //     name: "zhangsan",
29 //     age: 18,
30 //     friend: {
31 //         "newname": "xiaohong",
32 //         "newname2": "lisi"
33 //     }
34 // }, {}))
35 
36 console.log(deepCopy({
37     name: "zhangsan",
38     age: 18,
39     friend: ["xiaohong","lisi"]
40 }, {}))