1
var partitionLabels = function (s) {
2
  let last = 0,
3
    first = 0;
4

5
  let arr = [...new Set(s)],
6
    ss = [];
7
  let temp = "";
8

9
  first = s.indexOf(arr[0]);
10
  last = s.lastIndexOf(arr[0]);
11

12
  for (let i = 1; i < arr.length; i++) {
13
    if (s.indexOf(arr[i]) < last) {
14
      if (last < s.lastIndexOf(arr[i])) {
15
        last = s.lastIndexOf(arr[i]);
16
      }
17
    } else {
18
      temp = s.slice(first, last + 1);
19
      ss.push(temp.length);
20
      first = s.indexOf(arr[i]);
21
      last = s.lastIndexOf(arr[i]);
22
    }
23
  }
24

25
  temp = s.slice(first, last + 1);
26
  ss.push(temp.length);
27
  return ss;
28
};