static ItIt<short[]> shortArrayChunksIterator(short[] l, int chunkSize) {
  ret iteratorFromFunction(new IF0<short[]>() {
    int n = l(l), i;
    
    public short[] get() {
      if (i >= n) null;
      i += chunkSize;
      ret subShortArray(l, i-chunkSize, i);
    }
  });
}