code: static int[] uniquify(int[] ints) {
  		IntSet iset = new IntSet();
  		for (int i : ints) {
  			iset.add(i);
  		}
  		return iset.toIntArray();
  	}
docs: Returns a sorted copy of an integer array with duplicate values removed.
  @param ints the integer array
  @return the sorted copy with duplicates removed