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Anchoring a RE in a string
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Doug Lewan
Jun 8, 2012, 2:48:52 PM6/8/12
to help-gn...@gnu.org
Currently I'm trying to check the /beginning/ of a multi-line string with a regular expression.
The scenario looks like this:
(string-match "^\\s-+ABCD"
"qwer\n zxcv\n ABCD")
^ Matches here.
I want it to fail because the beginning doesn't match.
I hadn't expected the anchor (^) to match inside the string.
I can't be the only one to have wanted to do this.
What's the right way.
Thanks.
,Douglas
Douglas Lewan
Shubert Ticketing
(201) 489-8600 ext 224
The scenario looks like this:
(string-match "^\\s-+ABCD"
"qwer\n zxcv\n ABCD")
^ Matches here.
I want it to fail because the beginning doesn't match.
I hadn't expected the anchor (^) to match inside the string.
I can't be the only one to have wanted to do this.
What's the right way.
Thanks.
,Douglas
Douglas Lewan
Shubert Ticketing
(201) 489-8600 ext 224
Doug Lewan
Jun 8, 2012, 3:08:24 PM6/8/12
to help-gn...@gnu.org
I've found the /adequate/ solution.
(setq s (delete ?\n s))
(string-match "^\\s-+ABCD" s)
Still, is there no way of truly anchoring at the beginning of a string?
(setq s (delete ?\n s))
(string-match "^\\s-+ABCD" s)
Still, is there no way of truly anchoring at the beginning of a string?
jpkotta
Jun 8, 2012, 3:18:45 PM6/8/12
to help-gn...@gnu.org
jpkotta
Jun 8, 2012, 3:18:45 PM6/8/12
to gnu.ema...@googlegroups.com, help-gn...@gnu.org
On Friday, June 8, 2012 2:08:24 PM UTC-5, Doug Lewan wrote:
Doug Lewan
Jun 8, 2012, 5:06:25 PM6/8/12
to help-gn...@gnu.org
\` -- empty string at the beginning of buffer
Fantastic!
In fact, I'd found my first use for \' just recently. I don't know why it didn't strike me.
I will never run out of things to learn in emacs. As a video game, I still feel like I'm on level 2.
Fantastic!
In fact, I'd found my first use for \' just recently. I don't know why it didn't strike me.
I will never run out of things to learn in emacs. As a video game, I still feel like I'm on level 2.
Philipp Haselwarter
Jun 9, 2012, 3:28:22 PM6/9/12
to help-gn...@gnu.org
`rx' is cool when you're too lazy to look up special symbols
--
Philipp Haselwarter
--
Philipp Haselwarter
rusi
Jun 10, 2012, 1:38:18 AM6/10/12
to
On Jun 10, 12:28 am, Philipp Haselwarter <phil...@haselwarter.org>
wrote:
wrote:
> `rx' is cool when you're too lazy to look up special symbols
>
> --
> Philipp Haselwarter
Interesting!! Cant find an info page.
>
> --
> Philipp Haselwarter
Philipp Haselwarter
Jun 10, 2012, 3:06:16 AM6/10/12
to help-gn...@gnu.org
Moellmann's authorship notice: "[...] `rx.el', a regular expression
constructor. ".
Take a look at C-h f rx RET
--
Philipp Haselwarter
Drew Adams
Jun 10, 2012, 10:34:30 AM6/10/12
to Philipp Haselwarter, help-gn...@gnu.org
> Unfortunately, its only mention in emacs or elisp info is Gerd
> Moellmann's authorship notice: "[...] `rx.el', a regular expression
> constructor. ". Take a look at C-h f rx RET
If you cannot find something in the manuals, try searching for it at EmacsWiki
> Moellmann's authorship notice: "[...] `rx.el', a regular expression
> constructor. ". Take a look at C-h f rx RET
(or Google after that). Entering "rx" in the wiki search field shows this page
as the first search hit: http://emacswiki.org/emacs/rx.
(That of course is not intended to mean that something should not also be
mentioned in the manuals. It's just intended to help you find information. The
wiki is another resource, like help-gn...@gnu.org.)
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