#

## 2.4.8.12 Sharpsign A

`#`n `A`

`#`n `A` object`` constructs an n-dimensional array, using object as the value of the `:initial-contents` argument to make-array.

For example, `#2A((0 1 5) (foo 2 (hot dog)))` represents a 2-by-3 matrix:

     0       1       5
     foo     2       (hot dog)

In contrast, `#1A((0 1 5) (foo 2 (hot dog)))` represents a vector of length `2` whose elements are lists:

     (0 1 5) (foo 2 (hot dog))

`#0A((0 1 5) (foo 2 (hot dog)))` represents a zero-dimensional array whose sole element is a list:

     ((0 1 5) (foo 2 (hot dog)))

`#0A foo` represents a zero-dimensional array whose sole element is the symbol `foo`. The notation `#1A foo` is not valid because `foo` is not a sequence.

If some dimension of the array whose representation is being parsed is found to be `0`, all dimensions to the right (i.e., the higher numbered dimensions) are also considered to be `0`.

For information on how the Lisp printer prints arrays, see Section 22.1.3.4 (Printing Strings), Section 22.1.3.6 (Printing Bit Vectors), Section 22.1.3.7 (Printing Other Vectors), or Section 22.1.3.8 (Printing Other Arrays).

Copyright 1996-2005, LispWorks Ltd. All rights reserved.