javascript - Lodash:用值对象内部属性交换键

Question

我收到以下 JSON 响应:

users: {
    1: {
        name: "John",
        email: "john@test.com",
        id: 1,
        place: "NY"
    },
    2: {
        name: "Alex",
        email: "alex@test.com",
        id: 2,
        place: "FL"
    },
    3: {
        name: "Tony",
        email: "tony@test.com",
        id: 3,
        place: "TX"
    }
    .
    .
    .
    .
    .
    .
}

我想将内部对象值中的 id 键与电子邮件键交换，如下格式。

users: {
    "john@test.com": {
        name: "John",
        email: "john@test.com",
        id: 1,
        place: "NY"
    },
}

我正在使用下面的 lodash 代码来使其工作并且工作正常:

_.keyBy(_.values(data), 'email');

有没有更好的方法可以用 lodash 处理它？我是 lodash 的新手，我想了解代码是否可以进一步重构。

Answer 1

看到_.keyBy()接受一个集合(数组或对象)，您可以跳过_.values()调用:

const users = {"1":{"name":"John","email":"john@test.com","id":1,"place":"NY"},"2":{"name":"Alex","email":"alex@test.com","id":2,"place":"FL"},"3":{"name":"Tony","email":"tony@test.com","id":3,"place":"TX"}};

const result = _.keyBy(users, 'email');

console.log(result);

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