function recursiveBinarySearch(array, value, leftPosition, rightPosition) {
// Value DNE
if (leftPosition > rightPosition) return -1;
var middlePivot = Math.floor((leftPosition + rightPosition) / 2);
if (array[middlePivot] === value) {
return middlePivot;
} else if (array[middlePivot] > value) {
return recursiveBinarySearch(array, value, leftPosition, middlePivot - 1);
} else {
return recursiveBinarySearch(array, value, middlePivot + 1, rightPosition);
}
}