From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: elisp programming questions
Date: Sat, 03 Nov 2012 04:18:36 +0100 [thread overview]
Message-ID: <87d2zvml0z.fsf@informatimago.com> (raw)
In-Reply-To: jwvfw4xbbrv.fsf-monnier+gnu.emacs.help@gnu.org
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>>> (defvar say-hi-mode-map
>>> (let ((map (make-keymap)))
>>> (define-key map [left] 'say-hi)
>>> ;;(define-key map [right] 'say-hi)
>>> map))
>
>> DEFVAR only assigns the variable if it doesn't already have a value. So
>> when you run it the second time, it doesn't do anything because the
>> variable is already initialized.
>
> That's right.
I use defparameter instead.
(defmacro defparameter (symbol &optional initvalue docstring)
`(progn
(defvar ,symbol nil ,docstring)
(setq ,symbol ,initvalue)))
--
__Pascal Bourguignon__
http://www.informatimago.com
next prev parent reply other threads:[~2012-11-03 3:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.11660.1351139989.855.help-gnu-emacs@gnu.org>
2012-10-25 9:24 ` elisp programming questions Barry Margolin
2012-10-29 14:21 ` Stefan Monnier
2012-11-03 3:18 ` Pascal J. Bourguignon [this message]
2012-10-25 4:39 Evan Driscoll
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