javascript到达路径数组的元素 [英] javascript reach element by a path array

问题描述

我得到了这个路径数组:

I got this path array:

const path = ["a", "b", "c", "d"]

和类似的对象:

let obj = { "a": { "b": { "c": { "d": 10, "e": 20 } } } }

，而我想删除该 obj ["a"] ["b"] ["c"] ["d"] ，这样我的 obj 将

and I would like to delete that obj["a"]["b"]["c"]["d"] so my obj will be

{ "a": { "b": { "c": { "e": 20 } } } }

我尝试做一些 path.forEach 循环，将其附加，但是找不到我希望附加的正确方法，因此可以访问 obj 定位到正确的位置.

I've tried to do some path.forEach looping, appending it but couldn't find a proper way which I appended it as I wish to, so I could access obj to the right place.

推荐答案

您可以递归地执行此操作，然后使用 delete 删除基本情况下的最终键值对:

You could do this recursively and then use delete to remove the final key-value pair in your base-case:

const path = ["a", "b", "c", "d"]
const obj = { "a": { "b": { "c": { "d": 10, "e": 20 } } } };

const remove_from_path = (obj, [prop, ...rest]) => 
  !rest.length ? delete obj[prop] : remove_from_path(obj[prop], rest);

remove_from_path(obj, path);
console.log(obj);

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