[Openmcl-devel] (null #())

Raymond Wiker rwiker at gmail.com
Sun Oct 7 15:00:39 UTC 2012


On Oct 7, 2012, at 16:59 , Stas Boukarev <stassats at gmail.com> wrote:
> Taoufik Dachraoui <dachraoui.taoufik at gmail.com> writes:
> 
>> Hi
>> 
>> how to check that a sequence is null without using length?
> (alexandria:sequence-of-length-p sequence 0)


Or just

(defun is-null-vector (v)
              (and (vectorp v)
                   (zerop (first (array-dimensions v)))))



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