From: Jean Louis <bugs@gnu.support>
To: steve-humphreys@gmx.com
Cc: "help-gnu-emacs@gnu.org" <help-gnu-emacs@gnu.org>
Subject: Re: [External] : Use the characters "+" and "-" in regular expressions
Date: Fri, 21 May 2021 08:48:37 +0300 [thread overview]
Message-ID: <YKdJtXBz2nzXkpEk@protected.localdomain> (raw)
In-Reply-To: <trinity-78ba69ee-4833-4ac9-bad5-83c43de971f7-1621520886942@3c-app-mailcom-bs16>
* steve-humphreys@gmx.com <steve-humphreys@gmx.com> [2021-05-20 17:28]:
> I have settled with
>
> (string-match "^[:blank:]*$" s)
>
> This would match only strings with spaces, not sentences with
> spaces. What do you think?
That one is good to match nothing:
(string-match "^[:blank:]*$" "") ⇒ 0
(string-match "^[:blank:]*$" " ") ⇒ nil
(string-match "^[:blank:]*$" " ") ⇒ nil
You have to read the manual: (info "(elisp) Regular Expressions")
--
Jean
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next prev parent reply other threads:[~2021-05-21 5:48 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-19 16:07 Use the characters "+" and "-" in regular expressions steve-humphreys
2021-05-19 16:17 ` Skip Montanaro
2021-05-19 16:26 ` steve-humphreys
2021-05-19 16:47 ` Yuri Khan
2021-05-19 17:39 ` steve-humphreys
2021-05-19 19:16 ` tomas
2021-05-19 19:27 ` tomas
2021-05-19 19:30 ` Yuri Khan
2021-05-19 21:32 ` tomas
2021-05-19 21:59 ` [External] : " Drew Adams
2021-05-20 6:26 ` RE: [External] : " steve-humphreys
2021-05-20 7:59 ` steve-humphreys
2021-05-20 8:26 ` tomas
2021-05-20 8:41 ` steve-humphreys
2021-05-20 9:42 ` steve-humphreys
2021-05-20 9:56 ` tomas
2021-05-20 10:11 ` steve-humphreys
2021-05-20 10:22 ` tomas
2021-05-20 10:37 ` steve-humphreys
2021-05-20 10:50 ` tomas
2021-05-20 11:19 ` steve-humphreys
2021-05-20 11:27 ` steve-humphreys
2021-05-20 12:04 ` tomas
2021-05-20 11:31 ` Christopher Dimech
2021-05-20 11:40 ` steve-humphreys
2021-05-20 11:49 ` Christopher Dimech
2021-05-20 13:03 ` Jean Louis
2021-05-20 11:59 ` tomas
2021-05-20 12:53 ` Jean Louis
2021-05-20 12:46 ` Jean Louis
2021-05-20 13:55 ` steve-humphreys
2021-05-20 14:14 ` Jean Louis
2021-05-20 14:28 ` steve-humphreys
2021-05-20 16:24 ` Yuri Khan
2021-05-20 16:34 ` steve-humphreys
2021-05-20 17:16 ` Eduardo Ochs
2021-05-20 18:29 ` Drew Adams
2021-05-21 5:48 ` Jean Louis [this message]
2021-05-20 12:39 ` Jean Louis
2021-05-20 7:15 ` Dash in regexp character classes: Beginnig vs. end [was: Use the characters "+" and "-" in regular expressions] tomas
2021-05-20 8:08 ` Robert Pluim
2021-05-19 19:26 ` [External] : Re: Use the characters "+" and "-" in regular expressions Drew Adams
2021-05-19 19:25 ` Drew Adams
2021-05-19 16:27 ` tomas
2021-05-19 16:39 ` Skip Montanaro
2021-05-19 17:43 ` Marcin Borkowski
2021-05-19 19:10 ` tomas
2021-05-19 19:17 ` [External] : " Drew Adams
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