From: Jean Louis <bugs@gnu.support>
To: Heime <heimeborgia@protonmail.com>,
Heime via Users list for the GNU Emacs text editor
<help-gnu-emacs@gnu.org>
Subject: Re: Keywords as function arguments for control flow
Date: Sat, 30 Nov 2024 14:47:36 +0300 [thread overview]
Message-ID: <555DCC6F-72A4-428F-8AF3-1839FC1EB734@gnu.support> (raw)
In-Reply-To: <T-8Wb0ikJiYgxU35wDfVKEm_z8FfK1LYjqjopC3FsLiVqAHISqrEcfbDrOsgyVEp9tbon_DeQrwnL9KmrzqOevlLfGy-s_nrMUONUhA6ovU=@protonmail.com>
(defun cuprat (seqr)
(pcase seqr
('global (global-whitespace-mode 1)) ;; if seqr is 'global
(_ (whitespace-mode 1)))) ;; default case for other values
(cuprat 'global)
(cuprat 'other)
Explanation
pcase matches the argument seqr to specific patterns (like 'global).
If seqr is 'global, it applies (global-whitespace-mode 1).
The underscore (_) is a catch-all pattern that matches anything else, so in that case, (whitespace-mode 1) is called.
(defun cuprat (seqr)
(cond
((eq seqr 'global) (global-whitespace-mode 1)) ;; if seqr is 'global
(t (whitespace-mode 1)))) ;; default case for other values
(cuprat 'global)
(cuprat 'other)
Explanation
The cond form evaluates each condition in order.
The first condition checks if seqr is 'global, and if so, it runs (global-whitespace-mode 1).
The (t ...) clause is a fallback that handles all other cases, applying (whitespace-mode 1).
Personally I have not ever used pcase
Jean
next prev parent reply other threads:[~2024-11-30 11:47 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-28 15:21 Keywords as function arguments for control flow Heime via Users list for the GNU Emacs text editor
2024-11-29 6:18 ` Tassilo Horn
2024-11-29 21:06 ` [External] : " Drew Adams
2024-11-29 21:26 ` Heime via Users list for the GNU Emacs text editor
2024-11-30 11:47 ` Jean Louis [this message]
2024-11-30 11:55 ` Heime via Users list for the GNU Emacs text editor
2024-11-30 14:37 ` Jean Louis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=555DCC6F-72A4-428F-8AF3-1839FC1EB734@gnu.support \
--to=bugs@gnu.support \
--cc=heimeborgia@protonmail.com \
--cc=help-gnu-emacs@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).