From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: elisp programming questions Date: Sat, 03 Nov 2012 04:18:36 +0100 Organization: Informatimago Message-ID: <87d2zvml0z.fsf@informatimago.com> References: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1351912816 3059 80.91.229.3 (3 Nov 2012 03:20:16 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 3 Nov 2012 03:20:16 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Nov 03 04:20:26 2012 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1TUUHX-0002Ym-5q for geh-help-gnu-emacs@m.gmane.org; Sat, 03 Nov 2012 04:20:23 +0100 Original-Received: from localhost ([::1]:43158 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TUUHO-0004ET-Eq for geh-help-gnu-emacs@m.gmane.org; Fri, 02 Nov 2012 23:20:14 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 26 Original-X-Trace: individual.net G/3eEh5bTtqpB56I1v4igwCY2iMY7naQDDUlKeTNWUAy0kbYvCI38HOBt/h9K/2S4s Cancel-Lock: sha1:MTQ1N2JjYTJjZTIzMmVhNWQ2YWVhOGJkMzkyODlkNWE3Zjg0ODU0Ng== sha1:Refzgdioh7rZwZ7sRH6jRCPjsJQ= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (darwin) Original-Xref: usenet.stanford.edu gnu.emacs.help:195199 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:87528 Archived-At: Stefan Monnier 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