From: Jean Louis <bugs@gnu.support>
To: tomas@tuxteam.de
Cc: help-gnu-emacs@gnu.org, Yuri Khan <yuri.v.khan@gmail.com>
Subject: [SOLVED]: Re: Help improve regular expression for 24 hours format
Date: Thu, 24 Nov 2022 17:22:02 +0300 [thread overview]
Message-ID: <Y39+ChlieLhrK23R@protected.localdomain> (raw)
In-Reply-To: <Y39LNTPP7/yTtsn/@tuxteam.de>
* tomas@tuxteam.de <tomas@tuxteam.de> [2022-11-24 13:47]:
> On Thu, Nov 24, 2022 at 01:31:00PM +0300, Jean Louis wrote:
>
> [...]
>
> > Do you have completed example using:
> > (or (seq "0" (any digit)) (seq "1" (any digit)) (seq "2" (any "0-3"))) ?
>
> I'm not supposed to be doing this now, so the rest is left as an
> exercise to the reader, alas.
>
> Hint: look at the regexp your `rx' invocation produces and translate
> backwards from it.
I did the exercise and I came up with the below. It looks much better
this way. 🤝 Thanks much.
(defvar rcd-rx-time (rx line-start
(or (seq "0" (any digit)) (seq "1" (any digit)) (seq "2" (any "0-3")))
":"
(seq (any "0-5") (any digit))
line-end)
"Regular expression for 24 hours format")
➜ "^\\(?:0[[:digit:]]\\|1[[:digit:]]\\|2[0-3]\\):[0-5][[:digit:]]$"
--
Jean
Take action in Free Software Foundation campaigns:
https://www.fsf.org/campaigns
In support of Richard M. Stallman
https://stallmansupport.org/
next prev parent reply other threads:[~2022-11-24 14:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-24 3:36 Help improve regular expression for 24 hours format Jean Louis
2022-11-24 5:50 ` tomas
2022-11-24 6:32 ` Yuri Khan
2022-11-24 8:59 ` Jean Louis
2022-11-24 9:38 ` tomas
2022-11-24 10:31 ` Jean Louis
2022-11-24 10:45 ` tomas
2022-11-24 14:22 ` Jean Louis [this message]
2022-11-25 15:31 ` [SOLVED]: " Emanuel Berg
2022-11-26 18:08 ` Jean Louis
2022-11-24 14:30 ` Jean Louis
2022-11-24 13:09 ` Michael Heerdegen
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=Y39+ChlieLhrK23R@protected.localdomain \
--to=bugs@gnu.support \
--cc=help-gnu-emacs@gnu.org \
--cc=tomas@tuxteam.de \
--cc=yuri.v.khan@gmail.com \
/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).