数组追加数组元素

const arr1 = [

      [1, 2, 3],

      [11, 12, 13],

      [21, 22, 23],

    ]


const arr2 = [4, 14, 14]


const newArr = arr2.map((res, i) => {

    return [...arr1[i], res]

})



   
console.log('newArr', newArr)

 

打印如下