javascript - 将多个对象插入单个对象

Question

我正在考虑将多个 Json 对象推送到 1 个对象中。

目前我正在从 AJAX 解析一个数组，它的控制台日志是这样的

0:{id: "24", user: "Joe", pass: "pass", name: "Joe Bloggs", role: "Technical Support", …}
1:{id: "25", user: "Jim", pass: "pass", name: "Jim Bloggs", role: "Technical Support", …}
2:{id: "26", user: "John", pass: "pass", name: "John Bloggs", role: "Technical Support", …}

我需要运行一个循环，并将所有的 id 和用户以这种格式放入一行

0: {Joe : 24, Jim : 25, John : 26}

我该怎么做？

谢谢

Answer 1

您可以将数据缩减为一个新对象:

let a = [{id: "24", user: "Joe", pass: "pass", name: "Joe Bloggs", role: "Technical Support"},
{id: "25", user: "Jim", pass: "pass", name: "Jim Bloggs", role: "Technical Support"},
{id: "26", user: "John", pass: "pass", name: "John Bloggs", role: "Technical Support"}]

let res = a.reduce((a,b) => {
    a[b.user] = b.id;
    return a;
}, {});

console.log(res);

或者如果你更喜欢解构

let a = [{id: "24", user: "Joe", pass: "pass", name: "Joe Bloggs", role: "Technical Support"},
{id: "25", user: "Jim", pass: "pass", name: "Jim Bloggs", role: "Technical Support"},
{id: "26", user: "John", pass: "pass", name: "John Bloggs", role: "Technical Support"}]

let res = {};
for (let {id, user} of a) {
    res[user] = id;
}

console.log(res);