From: Lennart Borgman <lennart.borgman@gmail.com>
To: Cecil Westerhof <Cecil@decebal.nl>
Cc: help-gnu-emacs@gnu.org
Subject: Re: How to see that a variable holds t
Date: Sun, 3 Jan 2010 21:32:37 +0100 [thread overview]
Message-ID: <e01d8a51001031232t64115327p121add2b4edfa399@mail.gmail.com> (raw)
In-Reply-To: <87fx6ncdvc.fsf@Traian.DecebalComp>
On Sun, Jan 3, 2010 at 6:11 PM, Cecil Westerhof <Cecil@decebal.nl> wrote:
> At the moment I have the following function:
> (defun switch-gnus-idle-daemon-do-log ()
> (interactive)
> (setq gnus-idle-daemon-do-log
> (case gnus-idle-daemon-do-log
> (10 t)
> (otherwise 10)))
> (message "gnus-idle-daemon-do-log: %s" gnus-idle-daemon-do-log))
>
> I know that it looks like overkill a case for switching to two values,
> but I expect that in the future there will be more values.
>
> What I really would like is;
> (defun switch-gnus-idle-daemon-do-log ()
> (interactive)
> (setq gnus-idle-daemon-do-log
> (case gnus-idle-daemon-do-log
> (t 10)
> (otherwise t)))
> (message "gnus-idle-daemon-do-log: %s" gnus-idle-daemon-do-log))
>
> Because I would like the default to be t and not 10. (For when the value
> is not one of the defined values.) But when I do this, it is always set
> to 10, because the case does not make a difference between t and 10. How
> do I solve this?
Doesn't this work:
(let ((T t))
(case T
((eq T t) (message "was t!"))
(t (message "T=%S" T))))
next prev parent reply other threads:[~2010-01-03 20:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-03 17:11 How to see that a variable holds t Cecil Westerhof
2010-01-03 19:25 ` Andreas Politz
2010-01-03 20:32 ` Lennart Borgman [this message]
2010-01-03 21:46 ` Tim X
[not found] ` <87wrzysjty.fsf@hubble.informatimago.com>
2010-01-04 9:29 ` Cecil Westerhof
2010-01-04 16:44 ` Pascal J. Bourguignon
2010-01-04 17:11 ` Cecil Westerhof
2010-01-06 13:29 ` Cecil Westerhof
2010-01-06 18:12 ` Stefan Monnier
2010-01-06 18:30 ` Cecil Westerhof
2010-01-06 20:09 ` Pascal J. Bourguignon
2010-01-06 18:51 ` Pascal J. Bourguignon
2010-01-06 19:13 ` Cecil Westerhof
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