>== Auszüge aus der Nachricht von diogofsr vom 2012-10-25 17:52:
> Ruthard Baudach <ruthard.baud...@web.de> writes:
>
> > Attached is my first attempt on lisp programming, just put
> > (load "/path/to/alt-tab.lisp") in stumpwmrc, and try it.
>
> Nice work.
Thank you
> I didn't try it, but as this is your first time writing Lisp, you might
> want to make these changes:
>
> --- /tmp/alt-tab.lisp 2012-10-25 13:37:35.591757537 -0200
> +++ /tmp/new.lisp 2012-10-25 13:43:51.118854966 -0200
> @@ -37,14 +37,14 @@
> (setf *alt-tab-index* (mod (1+ *alt-tab-index*) (list-length
> *alt-tab-cycle*)))
> (select-window-by-number (nth *alt-tab-index* *alt-tab-cycle*)))
> ;; else start anew
> - (
> + (t
> (setf *alt-tab-index* 1)
> (setf *alt-tab-cycle* (copy-list *alt-tab-list*))
> ; if we've fokussed a frame without window, current-window will return
> nil => select last used
> (cond
> ((not (current-window))
> (select-window-by-number (first *alt-tab-cycle*)))
> - (
> + (t
> (push (window-number (current-window)) *alt-tab-cycle*)
> (select-window-by-number (second *alt-tab-cycle*))))))
>
> The first form in a `cond' is evaluated and if it evaluates to a
> generalized true, it runs the body.
>
> So:
>
> (defvar *foo*)
>
> (cond ((setf *foo* nil) 4)
> (t 2))
> ; => 2
>
> (cond ((setf *foo* 42) 4)
> (t 2))
> ; => 4
As far as I understood it, cond is the most general if - elsif - else
construct lisp knows, thus
(defvar *foo*)
(cond ((setf *foo* nil) 4)
( 2 ))
=> 2
At least this works for me using archlinux and the clisp of this
distribution. But adding the `T' in the last cond - clause might be more
portable?
Regards,
Ruthard
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