From: Keith David Bershatsky <esq@lawlist.com>
To: 18837@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 [thread overview]
Message-ID: <m2tx2rhnfm.wl%esq@lawlist.com> (raw)
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
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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
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next reply other threads:[~2014-10-25 21:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-25 21:03 Keith David Bershatsky [this message]
2014-10-26 2:44 ` bug#18837: 25.0.50; `sort` -- modify function to preserve original list Stefan Monnier
2014-10-26 5:04 ` Keith David Bershatsky
2019-09-16 5:30 ` Stefan Kangas
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