18.Bonfire: Where do I belong

Where do I belong

function where(arr, num) {
  newArr = arr.sort();
  finalArr = [];
  for (var i = 0; i < newArr.length; i++) {
    if (num > newArr[i] && num < newArr[i+1]) {
      finalArr.push(newArr[i]);
      finalArr.push(num);
    } else {
        finalArr.push(newArr[i]);
    }
  }
  return finalArr.indexOf(num);
}