Grokking 227

seen := new Set<String>();
for (i := 0; i < names.length; i++) {
  name := names[i];
  if (seen.contains(name)) {
    k := 1; // suffix
    while (seen.contains(name + "(" + k + ")")) {
      k++;
    }
    names[i] = name + "(" + k + ")";
  }
}
return names;