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Re: [External] : Re: Appending lists
From: |
Jean Louis |
Subject: |
Re: [External] : Re: Appending lists |
Date: |
Mon, 21 Jun 2021 02:30:00 +0300 |
User-agent: |
Mutt/2.0.7+183 (3d24855) (2021-05-28) |
* Emanuel Berg via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org> [2021-06-21 01:56]:
> But here it did again, despite `copy-sequence'!
>
> (progn
> (setq list-head '(1))
> (setq list-tail '(2 3 4))
> (setq list-tail-2 (copy-sequence list-tail))
> (setq whole-list (append list-head list-tail-2))
> (setcdr list-tail-2 '(3.5 4))
> whole-list
> ) ; (1 2 3.5 4)
Not like that, you have to use `copy-sequence' on the last element
within `append'
(progn
(setq list-head '(1))
(setq list-tail '(2 3 4))
(setq whole-list (append list-head (copy-sequence list-tail)))
(setcdr list-tail '(3.5 4))
whole-list
) ⇒ (1 2 3 4)
--
Jean
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- Re: [External] : Re: Appending lists, (continued)
- Re: [External] : Re: Appending lists, Jean Louis, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists, Jean Louis, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists,
Jean Louis <=
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists, Jean Louis, 2021/06/20
- Re: [External] : Re: Appending lists, Stefan Monnier, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20
- Re: [External] : Re: Appending lists, Emanuel Berg, 2021/06/20