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?

• Heretic Monkey: Please do basic research before asking.
• Teemu: What is the hard part? Forking the prototype? Creating the sum? Something else?
• kind user: Dupe hammer. OP wants to create a new function in Array prototype, not just sum all items in an array...

Answer 1

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())

Answer 2

You can try using Array.prototype.reduce():

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