您能否基于现有数组的值使用For循环来构建多个数组？

var arrA = ["box 1", "box 2", "box 3"]; 

for (i = 0; i < arrA.length; i++) {
  var arr[i] =[
    "Style[i]",
    "ListA[i]",
    "ListB[i]"
  ];
}

这不起作用，但是我正在寻找的结果是这样的输出

var arr1 = ["Style1","ListA1","ListB1"];
var arr2 = ["Style2","ListA2","ListB2"];
. . . .

根据数组长度继续重复多少时间？

Answer 1

您在寻找这个吗？

const arrA = ["box 1", "box 2", "box 3"]; 

const arrB = arrA.map((c,i)=>[`Style${i+1}`,`ListA${i+1}`,`ListB${i+1}`])

console.log( arrB )

Answer 2

将原始数组和新数组放入并返回结果的函数怎么样？

let addArray = (original, newArray) => {
  let result = original.push(newArray)
  return result
}

//Not sure what's meant by auto-populating them...But this 
//Will take an array of arrays, and simply push "newArray" into 
// "original" array of arrays.

Answer 3

如果我理解正确，那么您想从给定数组动态创建一些数组。我想你可以这样做

let arrA = ["box 1", "box 2", "box 3"]; 
let generatedArrays = {};
for (let i = 0 ; i< arrA.length ; i++){
 generatedArrays[arrA[i]] = []
 }
 console.log(generatedArrays)

Answer 4

您可以通过创建两个函数来实现此目的，一个函数初始化数组的第一个列表（在开始时调用一次），每次在第一个数组中添加新项时都调用一个： >

//first (master) array
var arrA = ["box 1", "box 2", "box 3"];
//array to hold individual box's array
var arrBoxes = []

function createInitArrays() {
  for (i = 0; i < arrA.length; i++) {
    arrBoxes[i] = [
      "Style" + (i + 1),
      "ListA" + (i + 1),
      "ListB" + (i + 1)
    ];
  }
}


function createNewArray() {
  var index = arrA.length
  arrBoxes[index] = [
    "Style" + (index+1),
    "ListA" + (index+1),
    "ListB" + (index+1)
  ];
}

//call to create initial arrays
createInitArrays()
// call to create new array every time you update 'arrA'
// createNewArray()

// display list of arrays based on 'arrA'
console.log(arrBoxes)

Javascript-使用For循环构建多个数组？

您能否基于现有数组的值使用For循环来构建多个数组？

4 个答案: