Algorithms - Recursion

nestedEvenSum.js

function nestedEvenSum (input) {
    let sum = 0;
    // Helper function to iterate through objects
    function iterateInnerObject (input) {
        for (let x in input) {
            // If value is number and even add to sum
            if (typeof(input[x]) === 'number' && input[x] % 2 === 0) sum += input[x];
            // If valus is object re run function 
            else if (typeof(input[x]) === 'object') iterateInnerObject(input[x])
        }
    }

    iterateInnerObject(input);

    return sum;
}


var obj1 = {
  outer: 2,
  obj: {
    inner: 2,
    otherObj: {
      superInner: 2,
      notANumber: true,
      alsoNotANumber: "yup"
    }
  }
}

var obj2 = {
  a: 2,
  b: {b: 2, bb: {b: 3, bb: {b: 2}}},
  c: {c: {c: 2}, cc: 'ball', ccc: 5},
  d: 1,
  e: {e: {e: 2}, ee: 'car'}
};

nestedEvenSum(obj1); // 6
nestedEvenSum(obj2); // 10