GNU bug report logs - #75170
add-to-alist: new function

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From: Roland Winkler <winkler <at> gnu.org>
To: Thierry Volpiatto <thievol <at> posteo.net>
Cc: 75170 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, Andrea Corallo <acorallo <at> gnu.org>, Stefan Kangas <stefankangas <at> gmail.com>
Subject: bug#75170: add-to-alist: new function
Date: Sun, 19 Jan 2025 15:21:38 -0600

On Sun, Jan 19 2025, Thierry Volpiatto wrote:
> While you are at it why not implementing a add-to-(a)list function that
> add/remove an elemnt at INDEX in list?
> It is what I am providing for my users in Helm.
>
> (setq example '((a . 1) (b . 6) (c . 3) (d . 4)))
>
> (helm-add-to-list 'example '(b . 2) 1 'replace)
>
> =>((a . 1) (b . 2) (c . 3) (d . 4))

I am just curious: when can this be useful?  Off my head, I cannot think
of any alists (alists that users my want to modify in their init file)
where order matters.

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