From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Pascal Bourguignon Newsgroups: gmane.emacs.help Subject: Re: newbie elisp help ?? Date: Wed, 15 Aug 2007 20:02:52 +0200 Organization: Informatimago Message-ID: <87bqd84qwj.fsf@thalassa.informatimago.com> References: NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1187203240 29986 80.91.229.12 (15 Aug 2007 18:40:40 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Wed, 15 Aug 2007 18:40:40 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Aug 15 20:40:37 2007 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1ILNnI-000751-Cn for geh-help-gnu-emacs@m.gmane.org; Wed, 15 Aug 2007 20:40:36 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1ILNnH-0003ST-SY for geh-help-gnu-emacs@m.gmane.org; Wed, 15 Aug 2007 14:40:35 -0400 Original-Path: shelby.stanford.edu!newsfeed.stanford.edu!syros.belnet.be!news.belnet.be!feeder.news-service.com!newsfeed.freenet.de!bolzen.all.de!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 56 Original-X-Trace: individual.net CzyUvb/sZtJegqEhWnQhEwe0UPhDsqva1e6W9KUvs7wdd2iKMt Cancel-Lock: sha1:ZDk1MzRjNmY5NjA2ZTE2NzQ3M2I5ZmQwZGNiOGYzYjhmMTdjNGM4Nw== sha1:rI3FaO/YfI23dob3NpBxVNJg+Sk= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.1008 (Gnus v5.10.8) Emacs/22.1.50 (gnu/linux) Original-Xref: shelby.stanford.edu gnu.emacs.help:151003 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:46578 Archived-At: William Case writes: > Hi; > > I am trying to write a function that will insert a line of asterisks+ > spaces across a buffer (as a section divider). It was started as an > exercise and has become an exercise in futility. > > I am working in the scratch pad using C-j to test the function as it is > being built. I have: (insert "* "). It returns "* nil". Wrong. (insert "* ") returns just nil, whose textual representation is inserted by the command bound to C-j. > Obviously I > don't want the "nil" to appear. How do I get rid of it? I don't know what command you have bound to C-j. I use C-x C-e and C-u C-x C-e to execute forms. Without C-u, it doesn't print (insert the textual representation of) the result of the form. > More importantly to me, how do I get the (insert "* ") command to repeat > 27 times to give me 54 characters across the buffer? Writting a loop! (require 'cl) C-x C-e (loop repeat 27 do (insert "* ")) C-x C-e inserts: * * * * * * * * * * * * * * * * * * * * * * * * * * * > I know how to make > a recursive loop, but it seems to me this is a fairly common challenge > and there is a probably a function for repetition that I can't find. How do I make a static mobile? How do I make a red blue? > I suppose I am asking for the programming equivalent of 'C-u n'. I suppose you could read some programming tutorial. Wouldn't that be a good idea? What about googling for: emacs lisp tutorial -- __Pascal Bourguignon__ http://www.informatimago.com/ NOTE: The most fundamental particles in this product are held together by a "gluing" force about which little is currently known and whose adhesive power can therefore not be permanently guaranteed.