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Re: Regular expression [message #53864 is a reply to message #36958]

Fri, 04 May 2007 09:04

Foldy Lajos
Messages: 268
Registered: October 2001

Senior Member

On Fri, 4 May 2007, Lasse Clausen wrote:

> mhmm, don't understand. Ok, here we go: I have a string like this
>
> bb[23]
>
> where bb can be any combination of alphanumerics and the number can be
> anything. I am looking for the regular expression that will match the
> whole thing. My first idea was (at the moment I am not bothered about
> the order of the different parts):
>
> regex = '[a-zA-Z0-9\[\]]+'
>

This regexp searches for a bracket expression (a-zA-Z0-9\[\) followed by
one or more ]'s. (\ behaves as an ordinary character after the opening
bracket [, so the first ] is the closing bracket.)

> but alas!
>
> print, stregex('bb[23]', regex)
> 4
>

3 matches the bracket expr. and ] matches itself. So the answer is 4.

> What?! And any combination of omitting or changing the \ character
> will result in either IDL complainign about non-balanced brackets, a
> match at position 4 or it won't match.
>

Try something like this:

[a-zA-Z0-9]+ one ore more alphanumeric char
\[ [
[0-9]+ one or more digits
] }

ie:

regex = '[a-zA-Z0-9]+\[[0-9]+]'

regards,
lajos

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[Message index]

		regular expressions (parsing strings) By: setthivoine you on Wed, 12 November 2003 12:04
		Re: Regular expression By: Foldy Lajos on Fri, 04 May 2007 11:13
		Re: Regular expression By: James Kuyper on Fri, 04 May 2007 10:44
		Re: Regular expression By: lasse on Fri, 04 May 2007 09:36
		Re: Regular expression By: Allan Whiteford on Tue, 08 May 2007 05:10
		Re: Regular expression By: Foldy Lajos on Fri, 04 May 2007 09:04
		Re: Regular expression By: Allan Whiteford on Fri, 04 May 2007 08:56
		Re: Regular expression By: lasse on Fri, 04 May 2007 08:46
		Re: Regular expression By: Allan Whiteford on Fri, 04 May 2007 08:41
		Re: Regular expression By: Foldy Lajos on Fri, 04 May 2007 08:21

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