在javascript中合并两个数组和分离数组

Question

我想分开颜色，大小，材料等，其中a和b阵列总是相同的长度。

a = ["Color", "Color", "color", "color", "Size", "size"]

b = ["black", "red", "blue", "green", "small", "large"]

我想要

output = [['black','red','blue','green'], ['small','large'],...]

Answer 1

在这里你可以找到我对你的问题的答案。 它首先存储在字典中，然后将其转换为数组。

下面的代码还将为颜色和大小随机排序的情况生成所需的结果。

null

const a = ["Color", "Color", "color", "color", "Size", "size", "color"];
const b = ["black", "red", "blue", "green", "small", "large", "white"];

let dict = [];
for(let i=0; i<a.length; i++) {
    let lowerCase = a[i].toLowerCase();
    if(!dict[lowerCase]) {
       dict[lowerCase] = [];
    }
    dict[lowerCase].push(b[i]);
}

let arr = [];
for(let item in dict) {
    arr.push(dict[item]);
}

console.log(arr);

Answer 2

要合并这两个数组，还可以使用foreach:

const a = ["Color", "Color", "color", "color", "Size", "size"];

常量b=[“black”，“red”，“blue”，“green”，“small”，“large”]；常量newArray=[]

const newArray2 = a.forEach((color) => {newArray.push(a+b);console.log(newArray)});

Answer 3

您可以使用reduce，然后通过object.values()获取值:

null

var a = ["Color", "Color", "color", "color", "Size", "size"];
var b = ["black", "red", "blue", "green", "small", "large"];

var result = Object.values(b.reduce((acc, elem,i)=>{
  const key = a[i].toLowerCase();
  acc[key] = [...(acc[key] || []), elem];
  return acc;
},{}));

console.log(result);