From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: append, push, and add-to-list.
Date: Mon, 05 Jul 2021 05:48:23 +0200 [thread overview]
Message-ID: <87czrxifp4.fsf@zoho.eu> (raw)
In-Reply-To: CAGP6POL-3hLgGT0ArSa5PE1ryS60C1vqfSa+YSE2FReG4g66YQ@mail.gmail.com
Hongyi Zhao wrote:
> On Mon, Jul 5, 2021 at 12:19 AM Emanuel Berg via Users list for the
> GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
>>
>> Hongyi Zhao wrote:
>>
>> > I've noticed there are some similar functions, i.e., append,
>> > push, and add-to-list, for revising/updating the content of
>> > a list. But I'm still not so clear on the specific use
>> > scenarios for them. Consider the following command [1]
>>
>> `nconc', `cl-pushnew', (setq lst `(,@lst el)) ...
>
> Does the following append `el' to `lst'?
>
> (setq lst `(,@lst el))
Yes, literally, but maybe it makes more sense if that is
evaluated as well?
(defvar lst)
(setq lst '(a b c))
(defvar el)
(setq el 4)
(setq lst `(,@lst ,el))
Now "lst" will be (a b c 4)
> This is one of the reasons that baffles me the most - there
> are so many functions in Emacs.
The more the merrier...
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-07-05 3:48 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-04 3:18 append, push, and add-to-list Hongyi Zhao
2021-07-04 4:35 ` Jean Louis
2021-07-04 5:11 ` Hongyi Zhao
2021-07-04 11:28 ` Jean Louis
2021-07-04 13:50 ` Hongyi Zhao
2021-07-04 15:58 ` Jean Louis
2021-07-05 2:04 ` Hongyi Zhao
2021-07-04 16:01 ` [External] : " Drew Adams
2021-07-04 16:20 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-04 16:19 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 2:16 ` Hongyi Zhao
2021-07-05 3:48 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2021-07-05 4:31 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 5:07 ` Hongyi Zhao
2021-07-05 5:50 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 6:19 ` Hongyi Zhao
2021-07-05 5:06 ` Jean Louis
2021-07-05 6:22 ` Hongyi Zhao
2021-07-05 6:32 ` Emanuel Berg via Users list for the GNU Emacs text editor
-- strict thread matches above, loose matches on Subject: below --
2021-07-05 14:37 Drew Adams
2021-07-05 14:53 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 15:19 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-07-05 16:46 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-06 19:54 ` Jean Louis
2021-07-06 20:08 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 15:41 ` tomas
2021-07-05 16:58 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 17:21 ` tomas
2021-07-06 1:17 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 18:10 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 18:18 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 18:11 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-05 18:39 ` Stefan Monnier via Users list for the GNU Emacs text editor
2021-07-05 20:35 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-06 19:57 ` Jean Louis
2021-07-06 20:16 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-07-06 19:56 ` Jean Louis
2021-07-06 20:15 ` Emanuel Berg via Users list for the GNU Emacs text editor
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