From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.emacs.gnus.user/17417 Path: news.gmane.org!not-for-mail From: Helmut Waitzmann Newsgroups: gmane.emacs.gnus.user Subject: Re: own webbased newsgroup types Date: Thu, 05 Feb 2015 02:28:54 +0100 Message-ID: <878ugdywls.fsf@helmutwaitzmann.news.arcor.de> References: <87r3u5uxz5.fsf@jupiter.lan> Reply-To: "Helmut Waitzmann Anti-Spam-Ticket.b.qc3c" NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1423099780 4289 80.91.229.3 (5 Feb 2015 01:29:40 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 5 Feb 2015 01:29:40 +0000 (UTC) To: info-gnus-english@gnu.org Original-X-From: info-gnus-english-bounces+gegu-info-gnus-english=m.gmane.org@gnu.org Thu Feb 05 02:29:39 2015 Return-path: Envelope-to: gegu-info-gnus-english@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 1YJBGD-0004Ne-BC for gegu-info-gnus-english@m.gmane.org; Thu, 05 Feb 2015 02:29:37 +0100 Original-Received: from localhost ([::1]:39630 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YJBGC-0000vx-P6 for gegu-info-gnus-english@m.gmane.org; Wed, 04 Feb 2015 20:29:36 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:41224) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YJBGB-0000uO-1d for info-gnus-english@gnu.org; Wed, 04 Feb 2015 20:29:35 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YJBG6-0007K5-2y for info-gnus-english@gnu.org; Wed, 04 Feb 2015 20:29:34 -0500 Original-Received: from plane.gmane.org ([80.91.229.3]:44883) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YJBG5-0007Jy-Sd for info-gnus-english@gnu.org; Wed, 04 Feb 2015 20:29:30 -0500 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1YJBFz-0004Gi-Up for info-gnus-english@gnu.org; Thu, 05 Feb 2015 02:29:24 +0100 Original-Received: from ip-109-42-173-1.web.vodafone.de ([109.42.173.1]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 05 Feb 2015 02:29:23 +0100 Original-Received: from oe.throttle by ip-109-42-173-1.web.vodafone.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 05 Feb 2015 02:29:23 +0100 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: info-gnus-english@gnu.org Original-Lines: 40 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: ip-109-42-173-1.web.vodafone.de Mail-Copies-To: nobody User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Cancel-Lock: sha1:c10xOFYT71jldmMNoc++MXJ3LhM= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 X-BeenThere: info-gnus-english@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: "Announcements and discussions for GNUS, the GNU Emacs Usenet newsreader \(in English\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: info-gnus-english-bounces+gegu-info-gnus-english=m.gmane.org@gnu.org Original-Sender: info-gnus-english-bounces+gegu-info-gnus-english=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.gnus.user:17417 Archived-At: Stefan Huchler writes: > (let ((last (car (last articles))) > (did nil) > > >I have no idea what this "did" thing is supposed to be You might read the documentation for the special form "let". To do that, type C-h f let RET Let me comment that documentation: The first parameter of "let" is the VARLIST, a list of variables. Each variable in that VARLIST is either a symbol: SYMBOL, which is bound to nil, or it is a list of 2 elements: (SYMBOL VALUEFORM), which binds the SYMBOL to the value of VALUEFORM. In your example: > (let ((last (car (last articles))) > (did nil) the first element of the VARLIST is a list of two elements: (last (car (last articles))) = (SYMBOL VALUEFORM) which tells "let" to bind the SYMBOL "last" to the value of the VALUEFORM (car (last articles)), and the second element of the VARLIST is a list of two elements, as well: (did nil) = (SYMBOL VALUEFORM) which tells "let" to bind the SYMBOL "did" to the value of the VALUEFORM nil.