如何添加值并嵌套对象

Question

const arr = [  [1, "string1", 'string11'],  [2, "string2", 'string22'],  [3, "string3", 'string33'],  [4, "string4", 'string44'],];const obj = arr.reduce((acc, val) => {  for (let i = 0; i < val.length; i += 3) {    acc[val[i]] = {      val: val[i + 2]    }  }  return acc;}, {});console.log(obj);output is :1: Objectval: "string11"2: Objectval: "string22"3: Objectval: "string33"4: Objectval: "string44"我想替换val: val[i+2]为val[i+1]: val[i+2]使对象成为1: Object"string1": "string11"2: Object"string2": "string22"3: Object"string3": "string33"4: Object"string4": "string44"但是这个语法是不正确的val[i+1]: val[i+2]，有人可以告诉我如何使它val成为动态的吗？

Answer 1

您可以使用ES6 的计算名称属性通过简单地用括号包裹来从变量设置属性名称。

const arr = [

  [1, "string1", 'string11'],

  [2, "string2", 'string22'],

  [3, "string3", 'string33'],

  [4, "string4", 'string44'],

];

const obj = arr.reduce((acc, val) => {

  for (let i = 0; i < val.length; i += 3) {

    acc[val[i]] = {

      [val[i + 1]]: val[i + 2]

   //-^^^^^^^^^^^^---- here

    }

  }

  return acc;

}, {});

console.log(obj);