Re: [Chicken-users] DBI

[Graham Fawcett]

On Wed, Feb 27, 2008 at 4:04 PM, Peter Bex <address@hidden> wrote:
>  > I've tended to let null be '(), but that partly comes from liking the
>  > look of
>  > (null? (alist-ref 'field result))  I'm not entirely comfortable with
>  > leaving the
>  > value entirely absent simply because the mapping I mention to value
>  > lists and vectors becomes more problematic.  That said, my usage of
>  > value lists and vectors is limited enough that I'm not that tied to it
>  > either.
>
>  Can you even check for void?  Afaik there's no VOID? procedure.

You can; just compare with another (void) value:

(define void? (cute eq? (void) <>))

Graham