From: pjb@informatimago.com (Pascal J. Bourguignon)
To: help-gnu-emacs@gnu.org
Subject: Re: How to see that a variable holds t
Date: Wed, 06 Jan 2010 19:51:40 +0100 [thread overview]
Message-ID: <87vdffrrr7.fsf@hubble.informatimago.com> (raw)
In-Reply-To: 878wcbicpc.fsf@Traian.DecebalComp
Cecil Westerhof <Cecil@decebal.nl> writes:
> pjb@informatimago.com (Pascal J. Bourguignon) writes:
>
>> (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))
>
> As earlier said: it works, but I do not understand the difference
> between:
> ((t) 10)
This is a clause that matches only t.
> and:
> (t 10)
This is the default clause. It matches anything.
(t) is a list of literal values specifying the case.
t is a symbol that is interpreted as meaning 'anything'.
--
__Pascal Bourguignon__ http://www.informatimago.com/
next prev parent reply other threads:[~2010-01-06 18:51 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
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 [this message]
2010-01-06 19:13 ` Cecil Westerhof
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