From: Jean Louis <bugs@gnu.support>
To: Heime <heimeborgia@protonmail.com>
Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Subject: Re: Functions with multiple optional arguments
Date: Mon, 17 Oct 2022 07:05:14 +0300 [thread overview]
Message-ID: <Y0zUeuQdIx2sYDGe@protected.localdomain> (raw)
In-Reply-To: <FL1ztjjucrxLSBjfWJdw63C4sECwGVJ737A96PJsEO0rdIUoqz5D3NGAH2OAYtZUJ0I_8UJa51pH_9UljPPmJzLKLka-sjclsyfTHOgPuqM=@protonmail.com>
* Heime via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org> [2022-10-17 00:06]:
> Have been writing a function that has two optional arguments. It is
> turning out to be a difficult task in situations when one in missing
> an argument. Anybody has experience about this, as I have not seen
> much code with multiple optional arguments.
If argument is optional but required by your function, I use this method:
(defun my-fun (&optional title description)
(let ((title (or title "Best Movie"))
(description (or description "Description")))
(message "%s: %s" title description)))
(my-fun)
--
Jean
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next prev parent reply other threads:[~2022-10-17 4:05 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-16 21:04 Functions with multiple optional arguments Heime via Users list for the GNU Emacs text editor
2022-10-17 1:48 ` Emanuel Berg
2022-10-17 4:05 ` Jean Louis [this message]
2022-10-17 4:18 ` Emanuel Berg
2022-10-17 21:12 ` Jean Louis
2022-10-17 21:36 ` Emanuel Berg
2022-10-20 21:00 ` Jean Louis
2022-10-21 3:29 ` Emanuel Berg
2022-10-23 4:47 ` Jean Louis
2022-10-24 3:07 ` Emanuel Berg
2022-10-25 5:25 ` Emanuel Berg
2022-10-17 5:42 ` Heime
2022-10-17 16:24 ` Heime
2022-10-17 16:52 ` [External] : " Drew Adams
2022-10-17 17:28 ` Heime
2022-10-17 17:38 ` Drew Adams
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