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Re: Regular expression [message #53867 is a reply to message #36958]

Fri, 04 May 2007 08:56

Allan Whiteford
Messages: 117
Registered: June 2006

Senior Member

Lasse,

Either:

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

or:

regex='[a-zA-Z0-9]{2}\[[0-9]{2}\]'

depending on whether your 'bb' and '23' need to be exactly two
characters long or not.

Note also you may want to check whether you're matching a substring
inside your search string or the complete string. I'm not sure what you
want to do.

Thanks,

Allan

Lasse Clausen wrote:
> On 4 May, 16:21, Fï¿½LDY Lajos <f...@rmki.kfki.hu> wrote:
>
>> On Fri, 4 May 2007, Lasse Clausen wrote:
>>
>>> Hi there,
>>
>>> why does
>>
>>> print, stregex('[', '[\[]')
>>
>>> work, i.e. produce 0, whereas
>>
>> You are searching for \ or [ ==> found.
>>
>>
>>> print, stregex(']', '[\]]')
>>
>>> prints -1?
>>
>> You are searching for \ followed by ] ==> not found.
>>
>>
>>> print, stregex(']', '\]')
>>
>>> works (i.e. prints 0).
>>
>> You are searching for ] ==> found.
>>
>> \ loses its 'escape char' meaning in a bracket expression, and becomes an
>> ordinary character.
>>
>> regards,
>> lajos
>
>
> 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\[\]]+'
>
> but alas!
>
> print, stregex('bb[23]', regex)
> 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.
>
> Help?
>
> Cheers
> Lasse
>

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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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