Package: emacs;
Reported by: Keith David Bershatsky <esq <at> lawlist.com>
Date: Sat, 25 Oct 2014 21:04:01 UTC
Severity: wishlist
Found in version 25.0.50
Done: Stefan Kangas <stefan <at> marxist.se>
Bug is archived. No further changes may be made.
View this message in rfc822 format
From: Keith David Bershatsky <esq <at> lawlist.com> To: 18837 <at> debbugs.gnu.org Subject: bug#18837: 25.0.50; `sort` -- modify function to preserve original list. Date: Sat, 25 Oct 2014 14:03:25 -0700
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 <at> 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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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))
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