From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Nikos Apostolakis Newsgroups: gmane.emacs.help Subject: Re: Need help in understanding an example of recursion Date: Sat, 02 Jun 2007 17:11:54 -0400 Message-ID: <87ira6vz6t.fsf@Sullivan.bcc.cuny.edu> References: <87sl9a9lb2.fsf@thalassa.lan.informatimago.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: sea.gmane.org 1180818751 5306 80.91.229.12 (2 Jun 2007 21:12:31 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Sat, 2 Jun 2007 21:12:31 +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 Jun 02 23:12:30 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 1Huate-0006mk-LD for geh-help-gnu-emacs@m.gmane.org; Sat, 02 Jun 2007 23:12:26 +0200 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Huate-0000E6-2c for geh-help-gnu-emacs@m.gmane.org; Sat, 02 Jun 2007 17:12:26 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HuatQ-0000Dr-Nv for help-gnu-emacs@gnu.org; Sat, 02 Jun 2007 17:12:12 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HuatO-0000Df-C2 for help-gnu-emacs@gnu.org; Sat, 02 Jun 2007 17:12:11 -0400 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HuatO-0000Dc-4x for help-gnu-emacs@gnu.org; Sat, 02 Jun 2007 17:12:10 -0400 Original-Received: from main.gmane.org ([80.91.229.2] helo=ciao.gmane.org) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1HuatN-0005ti-RW for help-gnu-emacs@gnu.org; Sat, 02 Jun 2007 17:12:10 -0400 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1HuatK-0008O5-5b for help-gnu-emacs@gnu.org; Sat, 02 Jun 2007 23:12:06 +0200 Original-Received: from 199.219.160.30 ([199.219.160.30]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 02 Jun 2007 23:12:06 +0200 Original-Received: from nikos.ap by 199.219.160.30 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sat, 02 Jun 2007 23:12:06 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 26 Original-X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 199.219.160.30 User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/23.0.51 (gnu/linux) Cancel-Lock: sha1:DKnTyMO5TWf8X0xjwooM6YVwBE4= X-detected-kernel: Linux 2.6, seldom 2.4 (older, 4) 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:44626 Archived-At: Pascal Bourguignon writes: > Nikos Apostolakis writes: >> Is there some subtle[0] point about recursion that I am missing? >> Any help in understanding this will be greatly appreciated. > > This is not a question of recursion. It's a question of something you > should have learned the first day of your first programming course, > that you should not use global variables and you should initialize > your variables! > > > Your variable named value is not a local variable of > nea-next-partition. Moreover, value is a variable that's bound to > new values automatically, read it's documentation. C-h v value RET > This is embarasing. I actually red the documentation, and I thought that in the dolist construction the third argument is automatically local. Not sure where I got the impression since the example in the manual does initialize the variable! Thanks for the answer and the tips, Nikos