for (int i = 0; i < tracks.length; i++) tracks[i].setUnrated();
for (int i = 0; i < tracks.length; i++) { Track track = tracks[i]; track.unSetRating(); track.unSetFile(); track.unSetWeight(); }
  public void purge(ServerDatabase db) {    Track[] tracks = db.getTracks();    for (int i = 0; i < tracks.length; i++)       tracks[i].setUnrated();  }