1
var removeSubfolders = function (folder) {
2
  folder = folder.sort();
3
  const result = [];
4
  for (let i in folder) {
5
    const f = folder[i];
6
    if (result.length == 0 || !f.startsWith(result[result.length - 1] + "/"))
7
      result.push(f);
8
  }
9
  return result;
10
};