Question

我有2个这样的数组：

array1 = ["green", "blue", "red"];
array2 = ["green", "green", "red", "red", "green", "green", "blue", "red", "Blue"];

但是我需要像这样的输出

output_array = ["green", "green", "green", "green", "blue", "Blue", "red", "red", "red"];

Answer 1

您可以将sort与indexOf一起使用：

const arr1 = ["green", "blue", "red"]
const arr2 = ["green", "green", "red", "red", "green", "green", "blue", "red", "blue"]

console.log(arr2.sort((a, b) => arr1.indexOf(a) - arr1.indexOf(b)))

Answer 2

希望这对您有帮助！

    array1=["green","red","blue"]; 
    array2=["green","green","red","red","green","green","blue","red","Blue"];

    const map = array2.reduce((acc, e) => acc.set(e, (acc.get(e) || 0) + 1), new Map());
    let result = array1.reduce((acc, a)=>  [...acc, ...Array(map.get(a)).fill(a)] , []);
    console.log(result);

Answer 3

我不知道您是否按字母顺序排列，但是您可以合并两个数组，然后对结果进行排序：

let output_array = array1.concat(array2);

output_array.sort()

根据第一个数组重新排列arraay

3 个答案: