javascript - 多个数组元素的总和

Question

我在 javascript 中有多个数组，我想对这些数组和最终数组求和。

EX: Array1 = [1,9,10,11], Array2 = [5,8,7,2], Total = [6,17,17,13].

Answer 1

var Array1 = [1,9,10,11];
var Array2 = [5,8,7,2]; 
var Total = [];

for( var i = 0; i < Array1.length; i++)
{
    Total.push(Array1[i]+Array2[i]);
}

顺便说一句，以大写字母开头的变量名感觉很尴尬。

Answer 2

function aSum(/*arrays list*/){
  var total=[],undefined;
  for(var i=0,l0=arguments.length;i<l0;i++)
    for(var j=0,arg=arguments[i],l1=arg.length;j<l1;j++)
      total[j]=(total[j]==undefined?0:total[j])+arg[j];
  return total;
}


var Array1 = [1,9,10,11], Array2 = [5,8,7,2], Array3 = [1,2,3,4,8];

console.log(aSum(Array1, Array2, Array3)); // [7, 19, 20, 17, 8]

Answer 3

var Array1 = [1,9,10,11];
var Array2 = [5,8,7,2];
var Total = new Array();
for(var i= 0;i<Math.min(Array1.length,Array2.length);i++){
  Total.push(Array1[i]+Array2[i]);
}
alert(Total);

Answer 4

ES6 中的箭头函数

var Array1 = [1,9,10,11];
var Array2 = [5,8,7,2]; 
var sum = Array1.map((val, idx) => val + Array2[idx]);

console.log(sum);