     full_arr = np.zeros([000000000, 0])     i, j = 0, 0      for arr in list(arr0..arr00):           # indices (i, j) incremented at each loop based on sub-array size         j += len(arr)         full_arr[i:j, :] = np.column_stack( process_sub_arrs(arr) )         i = j      return full_arr  