解压数组元素 inot 对象作为打字稿中的键

Question

无论如何，我可以将数组解包成一个对象，数组的每个元素作为对象的键和值都是 0？就像是

const arr = ['a', 'b', 'c', 'd']

//I want to have 

//const obj = {'a': 0, 'b': 0, 'c': 0}

Answer 1

Object.fromEntries与数组方法结合使用.map：const arr = ['a', 'b', 'c', 'd']//I want to have://const obj = {'a': 0, 'b': 0, 'c': 0}console.log(Object.fromEntries(arr.map(x => [x, 0])))

Answer 2

您可以使用Array.prototype.reduce()方法来制作所需的对象。const arr = ['a', 'b', 'c', 'd'];const ret = arr.reduce((prev, c) => {  const p = prev;  p[c] = 0;  return p;}, {});console.log(ret);