如何获取对象字符串中对象的值

Question

你好，我对此有点陌生，所以我想做的是

string = {
    "string2": {
        "value": ""
    }
}

var path = ["string2","value"]

我能以某种方式获得路径的价值我尝试了很多东西但没有任何效果

Answer 1

您可以为此使用 Array.reduce()：

const value = path.reduce((accum, key) => accum[key], string)

Answer 2

有几种方法。首先，可以使用循环一步步遍历路径如下：

const obj = { "string2": { "value": "Message" } };
const path = [ "string2", "value" ];

let output = obj;
path.forEach(key => {
    output = output[key];
});

console.log( output );

递归

const obj = { "string2": { "value": "Message" } };
const path = [ "string2", "value" ];

const trav = (o,p,i) => (i < p.length - 1) ? trav(o[p[i]],p,i+1) : o[p[i]];

console.log( trav(obj,path,0) );

新函数

const obj = { "string2": { "value": "Message" } };
const path = [ "string2", "value" ];

const output = (new Function(`return (obj.${path.join('.')})`))();

console.log( output );

如何获取对象字符串中对象的值

How do i get the value of an object in a object string

javascript

arrays

object