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Re: Regular expression [message #53859 is a reply to message #36958]

Fri, 04 May 2007 11:13

Foldy Lajos
Messages: 268
Registered: October 2001

Senior Member

On Fri, 4 May 2007, kuyper@wizard.net wrote:

> FÖLDY Lajos wrote:
>> On Fri, 4 May 2007, Lasse Clausen wrote:
>>
>>> Hi there,
>>>
>>> why does
>>>
>>> print, stregex('[', '[\[]')
>>>
>>> work, i.e. produce 0, whereas
>>>
>>
>> You are searching for \ or [ ==> found.
> ...
>> \ loses its 'escape char' meaning in a bracket expression, and becomes an
>> ordinary character.
>
> In other cases, such as the unix vi command, the regular expression \
> [[^\]]*] matches any string that starts with '[', has an arbitrarily
> long string of characters that are not ']', followed by a ']'
> character. In IDL, however, stregex("ab[23]", "\[[^\]]*]") returns -1.
> Is there any simple way to perform a similar search using IDL regular
> expression?
>

It's easy, just omit the backslash: print, stregex("ab[23]", "\[[^]]*]")
If you want to put a ] in the non-matching list, put it right after the ^.

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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