From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Keith David Bershatsky Newsgroups: gmane.emacs.bugs Subject: bug#18837: 25.0.50; `sort` -- modify function to preserve original list. Date: Sat, 25 Oct 2014 14:03:25 -0700 Message-ID: NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 (generated by - "") Content-Type: text/plain; charset=US-ASCII X-Trace: ger.gmane.org 1414271064 31757 80.91.229.3 (25 Oct 2014 21:04:24 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 25 Oct 2014 21:04:24 +0000 (UTC) To: 18837@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Oct 25 23:04:18 2014 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 1Xi8VV-0007qf-N4 for geb-bug-gnu-emacs@m.gmane.org; Sat, 25 Oct 2014 23:04:17 +0200 Original-Received: from localhost ([::1]:54627 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8VV-0005gx-8Y for geb-bug-gnu-emacs@m.gmane.org; Sat, 25 Oct 2014 17:04:17 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39974) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8VN-0005gg-0T for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:04:15 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xi8VG-0005xv-NK for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:04:08 -0400 Original-Received: from debbugs.gnu.org ([140.186.70.43]:43429) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8VG-0005xr-Jg for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:04:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Xi8VF-0002TJ-W4 for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:04:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Keith David Bershatsky Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 25 Oct 2014 21:04:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 18837 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.14142710359479 (code B ref -1); Sat, 25 Oct 2014 21:04:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 25 Oct 2014 21:03:55 +0000 Original-Received: from localhost ([127.0.0.1]:35527 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xi8V8-0002Sn-02 for submit@debbugs.gnu.org; Sat, 25 Oct 2014 17:03:54 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:38199) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Xi8V4-0002Sa-RO for submit@debbugs.gnu.org; Sat, 25 Oct 2014 17:03:51 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xi8Ut-0005w2-53 for submit@debbugs.gnu.org; Sat, 25 Oct 2014 17:03:45 -0400 Original-Received: from lists.gnu.org ([2001:4830:134:3::11]:38790) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8Ut-0005vy-24 for submit@debbugs.gnu.org; Sat, 25 Oct 2014 17:03:39 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:39906) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8Un-0005fU-Ds for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:03:39 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Xi8Uh-0005tt-QI for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:03:33 -0400 Original-Received: from cobb.liquidweb.com ([50.28.13.150]:46997) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xi8Uh-0005tD-Ip for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:03:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lawlist.com; s=default; h=Content-Type:MIME-Version:Subject:To:From:Message-ID:Date; bh=CJXQF5cdBf7LWFQ0IOMve/QRNVXvmmC17vfsEEqXP7g=; b=gRihxOePZOozN4+SIGau3anXzC4844IU3szLBFMsmb472SSUkVdXV4EmBmh+aRhzKUBwFyIXaLxvpBzWLUAszQV19z0TGI96gPmGAtlQcyDVhSEKXcbtGLyU0Fz+bPLU; Original-Received: from cpe-104-173-54-60.socal.res.rr.com ([104.173.54.60]:52005 helo=MP.local) by cobb.liquidweb.com with esmtp (Exim 4.82) (envelope-from ) id 1Xi8Uc-0005mq-E9 for bug-gnu-emacs@gnu.org; Sat, 25 Oct 2014 17:03:22 -0400 User-Agent: / () / () APEL/10.8 Emacs/25.0.50 (x86_64-apple-darwin10.8.0) MULE/6.0 (HANACHIRUSATO) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cobb.liquidweb.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lawlist.com X-Get-Message-Sender-Via: cobb.liquidweb.com: acl_c_relayhosts_text_entry: lawlist|lawlist.com X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x 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:95083 The doc-string for the function `sort` states that `SEQ is modified by side effects`; however, it does not state in what way the original list gets modified or why such a feature might somehow be useful. I attempted to find out the answer to this question on `superuser.com`, however, the community has expressed an interest in closing the question without offering an explanation on this issue: http://superuser.com/questions/831608/emacs-sort-usefulness-of-side-effect-modifying-initial-list In my use case, I want to preserve an initial list that is set to a let-bound variable so that I can use it again elsewhere in the function. To achieve this objection, I used `copy-list`. Unless the modified `SEQ` is somehow useful, perhaps it would be appropriate to modify the function `sort` so that it preserves the initial list. Thanks, Keith ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; In GNU Emacs 25.0.50.1 (x86_64-apple-darwin10.8.0, NS appkit-1038.36 Version 10.6.8 (Build 10K549)) of 2014-10-01 on MP.local Repository revision: 117996 dmantipov@yandex.ru-20141001132108-zdsxru2390mqyjlu Windowing system distributor `Apple', version 10.3.1038 Configured using: `configure --with-ns' Configured features: ACL LIBXML2 ZLIB Important settings: locale-coding-system: utf-8-unix Major mode: Fundamental Minor modes in effect: sd-mode: t sb-mode: t tb-mode: t shell-dirtrack-mode: t cm-mode: t bc-mode: t as-mode: t ds-mode: t ml-mode: t Recent input: Recent messages: Load-path shadows: /Users/HOME/.0.data/.0.emacs/.0.apel_flim_simi/md4 hides /Users/HOME/.0.data/.0.emacs/Emacs_10_01_2014.app/Contents/Resources/lisp/md4 /Users/HOME/.0.data/.0.emacs/.0.apel_flim_simi/hex-util hides /Users/HOME/.0.data/.0.emacs/Emacs_10_01_2014.app/Contents/Resources/lisp/hex-util 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ediff-help ediff-init ediff-util ediff ert ewoc debug eieio-base diff-mode conf-mode autorevert filenotify lorg-calendar org-element lorg-search org-agenda context-menu dired-read-filename lawlist-toodledo url-http url-auth url-gw url url-proxy url-privacy url-expand url-methods url-history url-cookie url-domsuf url-util url-parse auth-source eieio eieio-core password-cache url-vars mailcap json xml lawlist-org lawlist-calendar derived org byte-opt bytecomp byte-compile cconv org-macro org-footnote org-pcomplete pcomplete org-list org-faces org-entities org-version ob-emacs-lisp ob ob-tangle org-src ob-ref ob-lob ob-table ob-keys ob-exp ob-comint comint ansi-color ring ob-core ob-eval org-compat org-macs org-loaddefs cal-menu calendar cal-loaddefs noutline outline gnus-sum gnus-group gnus-undo gnus-start gnus-cloud nnimap nnmail mail-source tls utf7 mel path-util mime-def alist mcharset mcs-20 mcs-e20 pcustom pces pces-e20 pces-20 broken poe pym static apel-ver product netrc nnoo parse-time gnus-spec gnus-int gnus-range message dired format-spec mml mml-sec mm-decode mm-bodies mm-encode gmm-utils mailheader gnus-win lawlist-frame lawlist-cm lawlist-bbdb gnus gnus-ems nnheader gnus-util mail-utils wid-edit mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mailabbrev mail-extr rfc822 cl timezone lawlist-init pcase cl-macs gv advice help-fns easy-mmode edmacro kmacro cl-loaddefs cl-lib savehist server ps-print ps-def lpr find-func saveplace easymenu time-date tooltip electric uniquify ediff-hook vc-hooks lisp-float-type mwheel ns-win tool-bar dnd fontset image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote make-network-process cocoa ns multi-tty emacs) Memory information: ((conses 16 1096676 58375) (symbols 48 62784 0) (miscs 40 214 364) (strings 32 147723 21599) (string-bytes 1 4679349) (vectors 16 42737) (vector-slots 8 761520 19326) (floats 8 1105 51) (intervals 56 5302 730) (buffers 976 15))