From: apatheticagnostic <apatheticagnostic@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: elisp - anonymous function in an association list?
Date: Thu, 29 Nov 2007 07:04:29 -0800 (PST) [thread overview]
Message-ID: <8174d5ed-b956-4775-b209-759cc07620bf@j20g2000hsi.googlegroups.com> (raw)
In-Reply-To: de593600-4a24-49e4-9210-a8aa1bc624cd@a35g2000prf.googlegroups.com
On Nov 29, 10:01 am, apatheticagnostic <apatheticagnos...@gmail.com>
wrote:
> On Nov 29, 9:50 am, Marc Tfardy <m-t-o___CUT__IT...@web.de> wrote:
>
>
>
> > apatheticagnostic schrieb:
>
> > > take, for example this code showing what I mean:
>
> > > (defvar sample-alist '(("a" '(lambda ()
> > > (message "We worked!")))
> > > ("b" #'(lambda ()
> > > (message "B worked too!")))))
>
> > > (defun test-call (x)
> > > (funcall (cdr (assoc x sample-alist))))
>
> > > (test-call "a")
> > > (test-call "b")
>
> > > Both calls fail, with an error message like so:
>
> > This seems to work:
>
> > (defvar sample-alist '(("a" (lambda () (message "We worked!")))
> > ("b" (lambda () (message "B worked too!")))))
>
> > (defun test-call (x)
> > (funcall (eval (car (cdr (assoc x sample-alist))))))
>
> > (test-call "a")
> > "We worked!"
>
> > (test-call "b")
> > "B worked too!"
>
> > regards
>
> > Marc
>
> So it does. Well, I feel dumb now. I assumed that I would need to
> quote the lambda expressions in some way to prevent them from being
> evaluated at definition.
>
> Thanks a lot!
Sorry for the double-post but I wanted to point out that it works with
just (funcall (car (cdr (assoc x sample-list)))) and doesn't seem to
need the eval.
next prev parent reply other threads:[~2007-11-29 15:04 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-29 14:00 elisp - anonymous function in an association list? apatheticagnostic
2007-11-29 14:50 ` Marc Tfardy
2007-11-29 15:01 ` apatheticagnostic
2007-11-29 15:04 ` apatheticagnostic [this message]
2007-11-30 0:08 ` Johan Bockgård
2007-11-29 15:32 ` David Kastrup
2007-11-29 15:52 ` apatheticagnostic
2007-11-29 21:24 ` Barry Margolin
2007-11-29 15:41 ` Tassilo Horn
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