Re: Appending lists

[tomas]

On Wed, Jun 16, 2021 at 10:22:23AM -0400, Stefan Monnier via Users list for the 
GNU Emacs text editor wrote:
> tomas@tuxteam.de [2021-06-16 09:28:19] wrote:
> > Doing (foo x y) will *never* change "the variable x" -- unless
> > foo is a macro/special form.
> 
> Just to show that you should never say never:
> 
>     (let* ((x 5)
>            (y 6))
>       (cl-flet ((foo (a b) (setq x (+ a b) y (* a b)) (- a b)))
>         (list (foo x y) x y)))

Hey, that's cheating :-)

Cheers
 - t

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