Question

我有两个数组：

var arr1 = [1, 2, 3, 4];
var arr2 = [2, 3, 4, 5];

我希望最终的数组是：

var arr3 = [3,5,7,9]

如果可能的话，我怎么能用回调来实现呢？

Answer 1

使用Array.map（请参阅MDN）

var arrmerge = [1, 2, 3, 4].map(function (v, i) {return v + this[i];}, [2, 3, 4, 5]);

document.querySelector('#result').textContent = JSON.stringify(arrmerge);

<pre id="result"></pre>

Answer 2

简单地说，

var arr1 = [1, 2, 3, 4];
var arr2 = [2, 3, 4, 5];
var arr3 = [];
var i = 0;

for (; i < arr1.length; i++) {
    arr3[i] = arr1[i] + arr2[i];
}

console.log(arr3);

DEMO

Answer 3

只需遍历数组并总结值

＆＃13;

  var arr1 = [1, 2, 3, 4];
  var arr2 = [2, 3, 4, 5];

  for (i in arr1) {
    arr3[i] = arr1[i] + att2[i];
  }

＆＃13;

Answer 4

您可以查看，

function myFun(){ 
var arr1 = [1, 2, 3, 4];
var arr2 = [2, 3, 4, 5];
var arr3 = [];
var i = 0;
if(arr1.length == arr2.length){
for (; i < arr1.length; i++) 
arr3 [i] = arr1[i] + arr2[i];
console.log(arr3 );
} else{
console.log("Both arrays length are not equal");
}
}

如何在Javascript中将两个数组的各个元素相加到另一个数组中？

4 个答案:

DEMO