From: Robert Pluim <rpluim@gmail.com>
To: Alan Mackenzie <acm@muc.de>
Cc: emacs-devel@gnu.org
Subject: Re: Is there already an alist function which gets all matching elements, not just the first?
Date: Wed, 05 Oct 2022 12:45:00 +0200 [thread overview]
Message-ID: <87bkqq8s7n.fsf@gmail.com> (raw)
In-Reply-To: <Yz1VqhXOBLxY38gr@ACM> (Alan Mackenzie's message of "Wed, 5 Oct 2022 10:00:10 +0000")
>>>>> On Wed, 5 Oct 2022 10:00:10 +0000, Alan Mackenzie <acm@muc.de> said:
Alan> Hello, Emacs.
Alan> I want to be able to get all matching elements from an alist (thinking
Alan> about extending imenu). Something like
Alan> (assoc-all key list)
Alan> which would return a list of matches. After all, we have functions
Alan> which _delete_ all matches from an alist.
Alan> Does such a function already exist, perhaps in cl-*.el?
Just use assoc-delete-all and invert the test:
(assoc-delete-all mykey myalist (lambda (val key)
(not (eq val key))))
Robert
--
next prev parent reply other threads:[~2022-10-05 10:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-05 10:00 Is there already an alist function which gets all matching elements, not just the first? Alan Mackenzie
2022-10-05 10:45 ` Robert Pluim [this message]
2022-10-06 18:24 ` Alan Mackenzie
2022-10-05 18:16 ` Philip Kaludercic
2022-10-05 18:35 ` Lars Ingebrigtsen
2022-10-06 18:34 ` Alan Mackenzie
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