Array Addition of elements [duplicate]

Question

Consider an array

a = [-4,58,9,,-91]

So I want to add these element in such way that my result will be b= [-4 ,(58-4 = 54), (54+9=63),(63-91=-28) ] so my array result is [-4,54,63,-28].

Any solution?

it is not angular ................

Pranay Rana
– Pranay Rana

2017-12-13 05:10:01 +00:00
Commented Dec 13, 2017 at 5:10 — Pranay Rana
– Pranay Rana, Commented Dec 13, 2017 at 5:10

klugjo · Accepted Answer · 2017-12-13 05:14:07Z

2

To modify your array in place, you can use a forEach loop:

const a = [-4,58,9,-91];
a.forEach((elt, i, arr) => {
  if (i > 0) {
    arr[i] = elt + arr[i - 1];
  }
});

console.log(a); // [-4,54,63,-28]

answered Dec 13, 2017 at 5:14

klugjo

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