Recursion - Sum Nested Array

Question

I\'m trying to sum a nested array [1,2,[3,4],[],[5]] without using loops but I don\'t see what\'s wrong with what I have so far.

function sumItem         


        

Answer 1

function arraySum (array) {
  if (array.length > 0) {
    return arraySum(array[0]) + arraySum(array.slice(1));
  }
  if (array.length === 0) {
    return 0;
  } else {
    return array;
  }
};