Add corresponding elements in arrays

Question

What is the most compact way of adding corresponding elements of multiple arrays of same length ?

var a = [1,2,3];
var b = [5,5,5];
var c = [1,1,1];
resultant array should be [7,8,9]

I can do this with a simple for loop but could it be possible for jquery/lodash solution with minimum lines of code?

http://stackoverflow.com/questions/7135874/element-wise-operations-in-javascript — Cheery, Sep 24 '14 at 06:24
http://stackoverflow.com/questions/1230233/how-to-go-through-an-array-and-add-their-values — xkeshav, Sep 24 '14 at 06:26
Please try to understand the question before marking it as a duplicate and referring to links that are completely different questions. — Kamal Reddy, Sep 24 '14 at 06:52

score 0 · Answer 1 · edited Jun 20 '20 at 09:12

0

Simple loop:

var result = [];
for(var i=0;i<3;i++)
 result.push(a[i]+b[i]+c[i]);

Note: Assuming all array of same length 3.

DEMO

edited Jun 20 '20 at 09:12

Community

1
1

answered Sep 24 '14 at 06:25

Manwal

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Surely there's an easier way to do this with lodash – SSH This Feb 02 '18 at 19:17

score 0 · Answer 2 · answered Sep 24 '14 at 06:26

Well i'm not sure what you mean by the word 'Compact', either reduced number of lines or increased performance.. but the most reasonable and recommended way of doing it is through a simple loop:

var a = [1,2,3];
var b = [5,5,5];
var c = [1,1,1];
var result = [];    
for(var i=0; i<a.length; i++){result[i] = a[i]+b[i]+c[i];}

result will contain [7,8,9]

Add corresponding elements in arrays

2 Answers2

DEMO