如何联接两个 2D 数组

Question

我有两个2D数组和合并行VS行。arr1 = [[a,b,c],[d,e,f],[g,h,i]]arr2 = [[1,2,3],[4,5,6],[7,8,9]]我想要这样的输出arr2 = [[a,b,c,1,2,3],[d,e,f,4,5,6],[g,h,i,7,8,9]]如何使用地图方法执行此操作？

Answer 1

const arr1 = [

    ['a', 'b', 'c'],

    ['d', 'e', 'f'],

    ['g', 'h', 'i'],

];

const arr2 = [

    [1, 2, 3],

    [4, 5, 6],

    [7, 8, 9],

];

const result = arr1.map((arr1Item, i) => [...arr1Item, ...arr2[i]]);

console.log(result);

Answer 2

您可以与 一起使用：concatmap

var arr1 = [['a','b','c'],['d','e','f'],['g','h','i']];

var arr2 = [[1,2,3],[4,5,6],[7,8,9]];

var result = arr1.map((k,i)=>k.concat(arr2[i]));

console.log(result);

Answer 3

你可以使用地图，地图和推送，就像这样...

const foo = [

    ['a','b','c'],

    ['d','e','f'],

    ['g','h','i']

]

const bar = [

    [1,2,3],

    [4,5,6],

    [7,8,9]

]

foo.map((el, i) => {

    el.map((e) => {

        bar[i].push(e)

    })

})

console.log(bar)