从条目创建嵌套对象

Creating a nested object from entries

有没有办法从条目中生成嵌套的 JavaScript Object

Object.fromEntries() 不太会做,因为它不做嵌套对象。

const entries = [['a.b', 'c'], ['a.d', 'e']]

// Object.fromEntries(entries) returns:
{
    'a.b': 'c',
    'a.d': 'e',
}

// whatIAmLookingFor(entries) returns:
{
    a: {
        b: 'c',
        d: 'e',
    }
}

我想我找到了使用 lodash 的方法:

import set from 'lodash/set'

const result = {}
const entries = [['a.b', 'c'], ['a.d', 'e']]

entries.forEach((entry) => {
    const key = entry[0]
    const value = entry[1]
    set(result, key, value)
})

您可以减少数组 entries 并减少键。然后用最后一个key给最终对象赋值。

const
    setValue = (object, [key, value]) => {
        const
            keys = key.split('.'),
            last = keys.pop();
        keys.reduce((o, k) => o[k] ??= {}, object)[last] = value;
        return object;
    },
    entries = [['a.b', 'c'], ['a.d', 'e']],
    result = entries.reduce(setValue, {});

console.log(result);