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Re: xslt 2.0 regex iterate over captured substrings ==> regex-group(n)

From: Martin Honnen <mahotrash@-----.-->
To: NULL
Date: 6/7/2009 2:05:00 PM

RolfK wrote:

> I got a regex which returns many captured subtrings.
> My problem is that the regex is not in my hand and I need to iterate
> over all cpatured substring items by the regex-group() function.  This
> function requires an integer argument. Unfortunately I do not know the
> maximum index.
> 
> Actually  I need simply to conctinate all matching substrings. But as
> the max index is not known I can not do this.
> 
> What is the solution to that ?

You could use a sufficiently large enough number e.g. 200 if you assume 
there are not more than 200 groups and do
   string-join(for $g in 1 to 200 return regex-group($g), '')
that would concatenate all subgroups from 1 to 200 and as 
regex-group(someIndex) of a not existing index or not matching index 
gives a zero-length string that shouldn't change the result.

-- 

	Martin Honnen
	http://msmvps.com/blogs/martin_honnen/

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