From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: Re: dynamic and lexical scope, attempted summary with example Date: Mon, 21 Jul 2014 16:02:13 +0200 Organization: Aioe.org NNTP Server Message-ID: <87lhrmeroa.fsf@debian.uxu> References: <878unputvv.fsf@debian.uxu> <87bnsjsorp.fsf_-_@debian.uxu> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1405951529 12114 80.91.229.3 (21 Jul 2014 14:05:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 21 Jul 2014 14:05:29 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Jul 21 16:05:23 2014 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 1X9EDQ-0002fk-Ri for geh-help-gnu-emacs@m.gmane.org; Mon, 21 Jul 2014 16:05:20 +0200 Original-Received: from localhost ([::1]:34336 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X9EDQ-000884-Az for geh-help-gnu-emacs@m.gmane.org; Mon, 21 Jul 2014 10:05:20 -0400 Original-Path: usenet.stanford.edu!news.kjsl.com!feeder.erje.net!eu.feeder.erje.net!newsfeed.datemas.de!rt.uk.eu.org!aioe.org!.POSTED!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 39 Original-NNTP-Posting-Host: SIvZRMPqRkkTHAHL6NkRuw.user.speranza.aioe.org Original-X-Complaints-To: abuse@aioe.org User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) X-Notice: Filtered by postfilter v. 0.8.2 Cancel-Lock: sha1:RuF7hF9cWIVbgbqx4pGGH6zJJ1w= Mail-Copies-To: never Original-Xref: usenet.stanford.edu gnu.emacs.help:206588 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:98860 Archived-At: Michael Heerdegen writes: > Right, but I think in this case, it's not a good idea > to learn that in passing. I really recommend to read > some literature about it - this isn't trivial. Both > kinds of scope have their rights to exist and their > use cases. > > When I first heard about scope, I though "This does > only matter in situations I avoid". But lexical > scope in a functional language is a basis of lots of > advanced programming techniques. OTOH, dynamic scope > is as well imperative to programming in LISP. > > It's explained e.g. here: > > http://www.paulgraham.com/onlisp.html > > There are books easier to read than this, but the > chapter about scope is well understandable without > reading the rest, I think. Yeah... I read so much. Five years of pitch-black computer science. What do I get? Not a dime in my pocket and only "read the Emacs manual", "read the Elisp manual", read that, read this... Do I go around telling everyone: write code, write code, write code...? No. But the only reason I don't do that is because I know no one or very few would actually do it if I did. Well, let's see if anyone comments on the material in a more applied way... stayed tuned for the next episode of Operation Emacs - the same channel, the same terminal! PS. But thanks again for you other comments that were very helpful. DS. -- underground experts united