How to regex this

Lutoslaw

Hello, Why

\\begin\{verbatimtab\}[\n.]*\\end\{verbatimtab\}

does not match

\begin{verbatimtab}
10 56
3 235
\end{verbatimtab}

Any help appreciated,

Greetings - Jacek

Peter_in_2780

You generally need a modifier tacked on the end of the regex, or an extra parameter in the call to match or whatever to specify multiline input. I'm guessing your current call stops scanning at the first newline. Sorry I can't be more specific without knowing what regex engine/language/context you're using. Cheers, Peter

Software rusts. Simon Stephenson, ca 1994.

Lutoslaw

Thanks for answering! I tried to mess around NL settings, but without success. Could you get it working here: http://www.regexplanet.com/simple/index.html[^]? I'll be fine then (hopefully). Ultimately, I want to use it in VS find/replace dialog (Notepad++ does not support NL in regex :( ).

Greetings - Jacek

Peter_in_2780

I didn't look closely at the middle of your regex. :-O Your fragment [\n.]* matches any number of (newline or fullstop) Inside the square brackets, the fullstop is not a wildcard. That is probably not what you want. A simple .* is probably what you need if you are not interested in capturing the content, given that the multiline flag should take care of "any character" matching newline. Cheers, Peter

Software rusts. Simon Stephenson, ca 1994.

Lutoslaw

Peter_in_2780 wrote:

Inside the square brackets, the fullstop is not a wildcard.

Oh, that was too easy :mad: BUT, it would work if VS allowed to setup regex in a find/replace dialog. It is not possible though. However, the \n works. How to code that regex if . does not catch a new-line and it cannot be changed? (answer: code it yourself, but I would be nice if it wasn't necessary)

Greetings - Jacek

Lutoslaw

Huh, it's not very critical thing, but, unfortuantely, begun to like the research. I have tried just now:

string replaced = Regex.Replace(all, @"\\begin\{verbatimtab\}.*\\end\{verbatimtab\}", (Match m) => (m.Value), RegexOptions.Singleline);

The SingleLine mode specs: "Specifies single-line mode. Changes the meaning of the dot (.) so it matches every character (instead of every character except \n)." Didn't work.

Greetings - Jacek

Andreas Gieriet

Is this solved? If not, and if you are talking about C# Regex, then the following will do:

string p = @"\\begin\{verbatimtab\}[\s\S]*?\\end\{verbatimtab\}";
Console.WriteLine("{0}", Regex.Match(str1, p).Success);

The trick:

use [\s\S] to match any character, independent of singleline or multiline setting
use lazy match *? to allow multiple such groups to be matched individually

Cheers Andi

Lutoslaw

The topic is pretty outdated -- I have done it manually for much less time than I had spent trying to build a proper regex ;P Thanks for a nice trick to ignore multiline settings, though. :thumbsup:

Greetings - Jacek