从javascript对象属性创建路径 [英] Create path from javascript object property

问题描述

假设我有以下javascript对象

Let's say I've got the following javascript object

var obj = {
            a:{
                b:"value",
                c:{
                    d:"value2"
                }
            }
        }

当用"d"对象(例如，function getPath(obj, d))输入时，什么功能输出"a.c.d"字符串?我已经尝试过各种方法，包括对象路径，但它似乎不是设计好的为此

What function would, when input with the "d" object (for example, function getPath(obj, d)), output the "a.c.d" string? I've tried various things including object-path, but it doesn't seem to be designed for that

推荐答案

您可以使用迭代和递归方法.

You could use an iterative and recursive approach.

function getPath(object, key) {

    function iter(o, p) {
        if (typeof o === 'object') {
            return Object.keys(o).some(function (k) {
                return iter(o[k], p.concat(k));
            });
        }
        if (p[p.length - 1] === key) {
            path = p;
            return true;
        }
    }

    var path = [];
    iter(object, []);
    return path.join('.');
}

console.log(getPath({ d: { d: { d: { d: 'val' } } } }, 'd'));
console.log(getPath({ a: { b: 'value', c: { d: 'value2' } } }, 'd'));

.as-console-wrapper { max-height: 100% !important; top: 0; }

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