Array computation in javascript for add operation

Question

we have an array, we have to find the sum of all the elements in the array.

let a = [1, 3, 2, 0];

console.log(a.add());  ==> 6

How to implement add function please can you help me?

Please [do basic research before asking](https://stackoverflow.com/search?q=%5Bjavascript%5D+sum+of+all+elements+in+array). — Heretic Monkey, Oct 01 '20 at 12:49
What is the hard part? Forking the prototype? Creating the sum? Something else? — Teemu, Oct 01 '20 at 12:49
Dupe hammer. OP wants to create a new function in Array prototype, not just sum all items in an array... — kind user, Oct 01 '20 at 12:51

score 4 · Answer 1 · answered Oct 01 '20 at 12:49

There's no such function in Array prototype as add. You would have to create it.

Note: keep in mind that it's not recommended to modify the prototypes which may cause issues such as overwriting existing functions.

const a = [1, 3, 2, 0];
Array.prototype.add = function() {
   return this.reduce((a, b) => a + b, 0);
}

console.log(a.add())

score 1 · Answer 2 · answered Oct 01 '20 at 12:50

1

let a = [1, 3, 2, 0];
var total = a.reduce((a,c) => a+c, 0);
console.log(total);

answered Oct 01 '20 at 12:50

Mamun

2 Answers2