From: Jean Louis <bugs@gnu.support>
To: Heime <heimeborgia@protonmail.com>
Cc: Heime via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org>
Subject: Re: Testing whether a list contains at least one non-nil element
Date: Tue, 25 Oct 2022 13:46:28 +0300 [thread overview]
Message-ID: <Y1e+hCGEye/jqAp/@protected.localdomain> (raw)
In-Reply-To: <yo_QhxmNXHgw-go3qtQ1ui_qIYcRf_DkxPMakizW3aIPSHkd2mugAnQtHcXK8W3WHla_NV0Kj73b4fbz8az1qv_3wkYIBzjgwYCuQ0wo8n0=@protonmail.com>
* Heime <heimeborgia@protonmail.com> [2022-10-25 13:18]:
> I would like to test whether a list contains at least one non-nil element? If I do that, then
> I would be able to continue a loop where a non-nil element would mean that a match was found.
(cond ((memq nil '(1 2 nil)) (message "True, there is nil inside"))
((memq nil '(1 2 3)) (message "No, there is no nil inside"))) ⇒ "True, there is nil inside"
--
Jean
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next prev parent reply other threads:[~2022-10-25 10:46 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-25 10:16 Testing whether a list contains at least one non-nil element Heime
2022-10-25 10:46 ` Jean Louis [this message]
2022-10-25 10:47 ` Jean Louis
2022-10-25 10:50 ` Jean Louis
2022-10-25 12:12 ` Emanuel Berg
2022-10-26 18:56 ` Jean Louis
2022-10-27 3:54 ` [External] : " Drew Adams
2022-10-27 4:53 ` Jean Louis
2022-10-27 5:30 ` Emanuel Berg
2022-10-27 15:54 ` Drew Adams
2022-10-27 17:47 ` Elisp and CL (was: Re: [External] : Re: Testing whether a list contains at least one non-nil element) Emanuel Berg
2022-10-27 20:38 ` [External] : Re: Testing whether a list contains at least one non-nil element Jean Louis
2022-10-28 0:22 ` Emanuel Berg
2022-10-28 4:48 ` tomas
2022-10-28 5:19 ` Jean Louis
2022-10-28 6:20 ` Michael Heerdegen
2022-10-28 13:09 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-10-29 6:10 ` Michael Heerdegen
2022-10-29 15:25 ` Stefan Monnier via Users list for the GNU Emacs text editor
2022-10-30 12:49 ` Emanuel Berg
2022-10-29 6:38 ` tomas
2022-10-30 12:48 ` Emanuel Berg
2022-10-29 9:20 ` Emanuel Berg
2022-10-29 9:19 ` Emanuel Berg
2022-10-27 4:01 ` Emanuel Berg
2022-10-25 12:05 ` Michael Heerdegen
2022-10-25 12:15 ` Emanuel Berg
2022-10-25 15:59 ` [External] : " Drew Adams
2022-10-25 17:44 ` Emanuel Berg
2022-10-26 15:39 ` Drew Adams
2022-10-26 17:43 ` Emanuel Berg
2022-10-25 17:25 ` Joost Kremers
2022-10-25 17:51 ` Emanuel Berg
2022-10-25 19:44 ` Heime
2022-10-25 20:08 ` Joost Kremers
2022-10-25 20:15 ` [External] : " Drew Adams
2022-10-25 20:19 ` Joost Kremers
2022-10-26 3:00 ` Stefan Monnier via Users list for the GNU Emacs text editor
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