Re: How to see that a variable holds t

[Pascal J. Bourguignon]

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/