Creating an array of cumulative sum in javascript

Question

This is an example of what I need to do:

var myarray = [5, 10, 3, 2];

var result1 = myarray[0];
var result2 = myarray[1] + myarray[0];
var result3 = myarray         


        

Answer 1

var nums= [5, 10, 3, 2];
var runningSum = function(nums) {
   
    nums.reduce((acc, _, i) => (nums[i] += acc));
    return nums;
};