将键数组转换为键值对对象

Question

I know how to convert this:

const keys = [1, 2, 3];

To this:

[{key: 1, val: "q"}, {key: 2, val: "w"}, {key: 3, val: "e"}]

With a single mapping statement:

keys.map((x, i) => ({key: x, val: "qwe".charAt(i)}));

But I would actually like to get this:

{1: "q", 2: "w", 3: "e"}

Is there a neat way to do this in a single statement similar to the one above?

Answer 1

您可以使用减少：

keys.reduce((accumulator, value, index) => { accumulator[index] = "qwe".charAt(index); return accumulator; }, {})

Answer 2

Ahhh, got it:

const objects = Object.assign({}, ...keys.map((x, i) => ({[x]: "qwe".charAt(i)})));

Though I would be happy to hear other suggestions as well as any notes on this one...

Answer 3

You can use reduce, and empty object as the initial value for the accumulator and insert property-value pairs on it:

 const keys = [1, 2, 3]; let result = keys.reduce((obj, key, idx) => { obj[key] = 'qwe'[idx]; return obj }, {}); console.log(result)

Answer 4

Here is my solution.

 const keys = [1, 2, 3]; const vals = "qwe"; const result = keys.reduce((prev, cur, idx) => ({ ...prev, [cur]: vals[idx] }), {});