code: def validate_indices(indices, n):
      
      if len(indices):
          min_idx = indices.min()
          if min_idx < -1:
              msg = ("'indices' contains values less than allowed ({} < {})"
                     .format(min_idx, -1))
              raise ValueError(msg)
  
          max_idx = indices.max()
          if max_idx >= n:
              raise IndexError("indices are out-of-bounds")
docs: Perform bounds-checking for an indexer.
  
      -1 is allowed for indicating missing values.
  
      Parameters
      ----------
      indices : ndarray
      n : int
          length of the array being indexed
  
      Raises
      ------
      ValueError
  
      Examples
      --------
      >>> validate_indices([1, 2], 3)
      # OK
      >>> validate_indices([1, -2], 3)
      ValueError
      >>> validate_indices([1, 2, 3], 3)
      IndexError
      >>> validate_indices([-1, -1], 0)
      # OK
      >>> validate_indices([0, 1], 0)
      IndexError