Finding all possible combined (plus and minus) sums of n arguments JavaScript

We are required to write a JavaScript function that in any number of arguments (all of Number type).

The function should calculate all possible sums of addition and subtraction.

For example − If the arguments are 1, 2, 3

Then all possible combinations are −

1 + 2 + 3 1 - 2 - 3 1 + 2 - 3 1 - 2 + 3

Finally, the function should the sum that is closest to 0. In this case, that answer would just be 0.

Example

const findSmallestPositive = (...arr) => {    let set = new Set([Math.abs(arr[0])]);    for (let i = 1;    i < arr.length; i++){       const secondSet = new Set;       for (let d of Array.from(set)){          secondSet.add(Math.abs(d + arr[i]))          secondSet.add(Math.abs(d - arr[i]))       };       set = secondSet;    };    return Math.min(...Array.from(set)) }; console.log(findSmallestPositive(5,3)) console.log(findSmallestPositive(1,2,3)) console.log(findSmallestPositive(1,2,3,5))

Output

This will produce the following output −

2 0 1