* associative list won't append variable contents
@ 2006-01-31 5:18 Dr. Shred
2006-01-31 10:31 ` David Hansen
0 siblings, 1 reply; 4+ messages in thread
From: Dr. Shred @ 2006-01-31 5:18 UTC (permalink / raw)
Hi,
(setq car-0 foo-0)
(setq cdr-0 foo-1)
(setq file-list (append '((car-0 . cdr-0)) file-list))
I want the contents of car-0 and cdr-0 to be the actual
car and cdr.
Lisp creates
((car-0 . cdr-0))
not
((foo-0 . foo-1))
Shouldn't this work?
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: associative list won't append variable contents
2006-01-31 5:18 associative list won't append variable contents Dr. Shred
@ 2006-01-31 10:31 ` David Hansen
2006-02-14 5:19 ` Dr. Shred
0 siblings, 1 reply; 4+ messages in thread
From: David Hansen @ 2006-01-31 10:31 UTC (permalink / raw)
On Tue, 31 Jan 2006 05:18:25 GMT Shred wrote:
> (setq car-0 foo-0)
> (setq cdr-0 foo-1)
> (setq file-list (append '((car-0 . cdr-0)) file-list))
>
> I want the contents of car-0 and cdr-0 to be the actual
> car and cdr.
>
> Lisp creates
>
> ((car-0 . cdr-0))
>
> not
>
> ((foo-0 . foo-1))
>
> Shouldn't this work?
The `quote' inhibits all evaluation. Either use the
`list'and `cons' function
(append (list (cons car-0 cdr-0)) file-list)
or the IMHO easier to read `backquote' (C-h f backquote RET
for more information):
(append `((,car-0 . ,cdr-0)) file-list)
David
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: associative list won't append variable contents
2006-01-31 10:31 ` David Hansen
@ 2006-02-14 5:19 ` Dr. Shred
2006-02-14 9:42 ` Peter Dyballa
0 siblings, 1 reply; 4+ messages in thread
From: Dr. Shred @ 2006-02-14 5:19 UTC (permalink / raw)
It worked. Thanks! I couldn't find this info in the emacs
manual. Is there some good documentation available for
emacs lisp?
David Hansen wrote:
> On Tue, 31 Jan 2006 05:18:25 GMT Shred wrote:
>
>
>>(setq car-0 foo-0)
>>(setq cdr-0 foo-1)
>>(setq file-list (append '((car-0 . cdr-0)) file-list))
>>
>>I want the contents of car-0 and cdr-0 to be the actual
>>car and cdr.
>>
>>Lisp creates
>>
>>((car-0 . cdr-0))
>>
>>not
>>
>>((foo-0 . foo-1))
>>
>>Shouldn't this work?
>
>
> The `quote' inhibits all evaluation. Either use the
> `list'and `cons' function
>
> (append (list (cons car-0 cdr-0)) file-list)
>
> or the IMHO easier to read `backquote' (C-h f backquote RET
> for more information):
>
> (append `((,car-0 . ,cdr-0)) file-list)
>
> David
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2006-02-14 9:42 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2006-01-31 5:18 associative list won't append variable contents Dr. Shred
2006-01-31 10:31 ` David Hansen
2006-02-14 5:19 ` Dr. Shred
2006-02-14 9:42 ` Peter Dyballa
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