From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Drew Adams" Newsgroups: gmane.emacs.bugs Subject: bug#12314: 24.2.50; `add-to-history': use `setq' with `delete' Date: Sat, 8 Sep 2012 07:57:12 -0700 Message-ID: <2C45207ADF0E46BC98AF1B486695F632@us.oracle.com> References: <7602D24B74DE42CF9901322634B85CA2@us.oracle.com> <87sjas4mc2.fsf@gnu.org> <83ipbomv6e.fsf@gnu.org> 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 1347116265 21242 80.91.229.3 (8 Sep 2012 14:57:45 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 8 Sep 2012 14:57:45 +0000 (UTC) Cc: 12314@debbugs.gnu.org To: "'Eli Zaretskii'" , "'Chong Yidong'" Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Sep 08 16:57:47 2012 Return-path: Envelope-to: geb-bug-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 1TAMTi-0006YC-VI for geb-bug-gnu-emacs@m.gmane.org; Sat, 08 Sep 2012 16:57:47 +0200 Original-Received: from localhost ([::1]:56069 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAMTf-0000Wh-GT for geb-bug-gnu-emacs@m.gmane.org; Sat, 08 Sep 2012 10:57:43 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:52984) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAMTc-0000Wc-Cx for bug-gnu-emacs@gnu.org; Sat, 08 Sep 2012 10:57:41 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TAMTb-0000tl-EV for bug-gnu-emacs@gnu.org; Sat, 08 Sep 2012 10:57:40 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:39193) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TAMTb-0000th-Av for bug-gnu-emacs@gnu.org; Sat, 08 Sep 2012 10:57:39 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.72) (envelope-from ) id 1TAMTy-0004kv-ER for bug-gnu-emacs@gnu.org; Sat, 08 Sep 2012 10:58:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: "Drew Adams" Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 08 Sep 2012 14:58:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 12314 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 12314-submit@debbugs.gnu.org id=B12314.134711626918263 (code B ref 12314); Sat, 08 Sep 2012 14:58:02 +0000 Original-Received: (at 12314) by debbugs.gnu.org; 8 Sep 2012 14:57:49 +0000 Original-Received: from localhost ([127.0.0.1]:48739 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TAMTl-0004kV-DK for submit@debbugs.gnu.org; Sat, 08 Sep 2012 10:57:49 -0400 Original-Received: from rcsinet15.oracle.com ([148.87.113.117]:37885) by debbugs.gnu.org with esmtp (Exim 4.72) (envelope-from ) id 1TAMTi-0004kN-FA for 12314@debbugs.gnu.org; Sat, 08 Sep 2012 10:57:47 -0400 Original-Received: from acsinet22.oracle.com (acsinet22.oracle.com [141.146.126.238]) by rcsinet15.oracle.com (Sentrion-MTA-4.2.2/Sentrion-MTA-4.2.2) with ESMTP id q88EvLSe004509 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 8 Sep 2012 14:57:21 GMT Original-Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by acsinet22.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id q88EvKSx029714 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 8 Sep 2012 14:57:21 GMT Original-Received: from abhmt110.oracle.com (abhmt110.oracle.com [141.146.116.62]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id q88EvKYB011425; Sat, 8 Sep 2012 09:57:20 -0500 Original-Received: from dradamslap1 (/71.202.147.44) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sat, 08 Sep 2012 07:57:20 -0700 X-Mailer: Microsoft Office Outlook 11 In-Reply-To: <83ipbomv6e.fsf@gnu.org> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 Thread-Index: Ac2N0G+t6+aDiW28S72Wu/hzGjwvXwAAMCYg X-Source-IP: acsinet22.oracle.com [141.146.126.238] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.13 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:63943 Archived-At: > Does this mean the ELisp manual is in error? It says: > > -- Function: delete object sequence > If `sequence' is a list, this function destructively removes all > elements `equal' to OBJECT from SEQUENCE. > ... > If `sequence' is a vector or string, `delete' returns a copy of > `sequence' with all elements `equal' to `object' removed. > > 'history' is a list, isn't it? Yes, it is a list. What is your point/question? Keep reading the same section of the manual (section for `delete'): ;; If you want to change `l' reliably, ;; write `(setq l (delete '(2) l))'. There is more explanation higher up in the same node, under `delq': Don't assume that a variable which formerly held the argument LIST now has fewer elements, or that it still holds the original list! Instead, save the result of `delq' and use that. Most often we store the result back into the variable that held the original list: (setq flowers (delq 'rose flowers)) I would imagine that you already know this, so I'm likely missing something in your question. But if you don't already know this, or if you knew it but forgot it, there's no harm/shame in that. Does this help, or were you referring to something else?