Re: Help with Lisp type system

Thomas M. Hermann <tmh.public@xxxxxxxxx> wrote:

On Dec 5, 12:04 pm, w...@xxxxxxxxxxxxxxx (Bob Felts) wrote:
Given +foo+ and +bar+ (2 constants, value not really important here),
I'd like to make an unsigned-byte 8 sequence containing these two
values. The brute force way:

(let ((blob (make-array 2 :element-type '(unsigned-byte 8))))
(setf (aref blob 0) +foo+)
(setf (aref blob 1) +bar+)
blob))

But surely I ought to be able to use :initial-contents to populate the
array. I just haven't been able to find the right incantation that
makes everyone happy.

Any help appreciated.

Not sure how you are specifying the initial-contents, but this worked
for me:

(make-array 2 :element-type '(unsigned-byte 8) :initial-contents (list
+foo+ +bar+))

or

(make-array 2 :element-type '(unsigned-byte 8) :initial-contents
(vector +foo+ +bar+))


I could have sworn I tried that. Thanks for the help.
.

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