JS基础 改对象中的Key名，变数组中的值为新的字典型中的Key

ES6语法，用underscore.js库

题目

假定我有对象

let obj = {
    1: {
        vegetables: ['banana', 'peach']
    },
    2: {
        vegetables: ['pear', 'grapefruit']  
    }
};12345678

想将其变成

let obj = {
    1: {
        fruit: {
            'banana': true, 
            'peach': true
        }
    },
    2: {
        fruit: {
            'pear': true, 
            'grapefruit': true
        }   
    }
};1234567891011121314

思路

先变key名，再在新key名所带的list对象将值变为新的字典对象的key

痛点

1.变Key名的语法

Object.defineProperty(obj, ‘newKeyName’, Object.getOwnPropertyDescriptor(obj, ‘oldKeyName’));1

2.既然是由list对象变为字典对象，一定会有obj.newKeyName = {}
这一出
3.旧的Key别忘了删除哦！

解题

_.each(obj, (item) => {
    Object.defineProperty(item, 'fruit', Object.getOwnPropertyDescriptor(item, 'vegetables'));
    item.fruit = {}; /*attach a new object to the new key name cuz this new obj will be a dictionary type soon*/
    _.each(item.vegetables, (data) => {
       item.fruit[data] = true; 
    }); /*for each value under the old key, I wanna set such value as the key for the dictionary attached to the new keyname*/
    delete item.vegetables;
});123456789

Output is :

{"1":{"fruit":{"banana":true,"peach":true}},"2":{"fruit":{"pear":true,"grapefruit":true}}}1

思考

您有更简便的方法吗？