Javascript代码的小小疑问（85）——深拷贝

Question

function deepcopy(obj) { //归 if (typeof obj != 'object') { return obj; } //递 var newObj = {}; for (var attr in obj) { newObj[attr] = deepcopy[attr]; } return newObj[attr]; }; var x = { "a":{ "b":"old" } }; var x2 = deepcopy(x); x2.a.b = "new"; console.log(x.a.b); //真是奇葩，为何老提示could not read propery"a",not defined... "

Answer 1

没看懂你要做什么，但是你的逻辑有问题，因为你deepcopy里面都没有创建a,b对象

Answer 2

newObj[attr] = deepcopy[attr];  检查代码