code: public static int[] init(final int[] indexes) {
  		for (int i = 0; i < indexes.length; ++i) {
  			indexes[i] = i;
  		}
  		return indexes;
  	}
docs: Initializes the given {@code indexes} array.
  
  @param indexes the indexes array to initialize
  @return the initialized indexes array
  @throws NullPointerException if the given {@code indexes} array is
  {@code null}