code: public void clear ()
      {
      if (data != null) {
          for (int i = 0; i < (length * 5); i++)
          data [i] = null;
      }
      length = 0;
      }
docs: Clear the attribute list for reuse.
  
  <p>Note that little memory is freed by this call:
  the current array is kept so it can be
  reused.</p>