From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: Basic questions about elisp Date: Thu, 05 Nov 2009 15:41:02 +0100 Organization: Informatimago Message-ID: <87iqdpdog1.fsf@galatea.local> References: <1e9f8449-09ec-4a84-a332-9f05fadb8aa3@z41g2000yqz.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1257435926 19391 80.91.229.12 (5 Nov 2009 15:45:26 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Nov 2009 15:45:26 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Nov 05 16:45:11 2009 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 1N64WK-0005BG-75 for geh-help-gnu-emacs@m.gmane.org; Thu, 05 Nov 2009 16:45:10 +0100 Original-Received: from localhost ([127.0.0.1]:38454 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1N64WI-0003xS-K5 for geh-help-gnu-emacs@m.gmane.org; Thu, 05 Nov 2009 10:45:06 -0500 Original-Path: news.stanford.edu!usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 41 Original-X-Trace: individual.net HssU+7pKGeY3YRz6OBxG7AfvSa+pSbc2LT4fJC3jTWv95LoaM8 Cancel-Lock: sha1:MzNmODVmMDFhZmE2MTFjOWU4YjU1OTYyOTBkMmI4MjgzYTM5OTNmYQ== sha1:C6MM53NM5kp7MrRqFoG2XnMBlCI= 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/22.3 (darwin) Original-Xref: news.stanford.edu gnu.emacs.help:174423 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:69498 Archived-At: Francis Moreau writes: > Hello, > > I'm trying to learn elisp and have a couple of basic questions. > > I'm iterating over a list using dotimes, but in the body of dotimes, dolist dolist > the list can mutate. For example I have: > > (dolist (elt lst) > ;; some codes > (nconc lst '(2))) This is an infinite loop. It will break when the program runs out of memory. > This adds/appends a new element to 'lst' list. It looks like 'dotimes' dolist > doesn't like it. If you are not careful, you won't be able to program... > I also need to iterate over elements of a vector. I basically use a > 'while' loop as above. Is there any helper to do that, I looked at > "(elisp) Sequences Arrays Vectors" but found nothing appropriate. (require 'cl) (loop for element in list do (something element)) (loop for element across vector do (something element)) > And finally, is it the good place to ask such questions about elisp ? Yes, it's right here. -- __Pascal Bourguignon__