I don't know. I searched around a bit for you...
Perhaps you can't use match variables in {} quantifier brackets?
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
On Behalf Of Ranga Nathan
Sent: Friday, October 11, 2002 2:20 PM
To: [EMAIL PROTECTED]
Subject: RE: [Boston.pm] Calling regex gurus ..A regex question..
Thanks guys that was quick response;
In the context of Any2XML, which forces me to use a regex for top-down
parsing, I need to use regex. Even if the regex is slow, that is fine.
If it is impossible to do this in regex, of course, I would resort to
split().
Can this be done using regex? Why does \1 not work? These are my
questions.
Thanks again...
---Closing information gaps-----
Ranga Nathan, Reliance Technology
>>SEVIS solution now! http://goreliance.com
>>Live demo at http://any2xml.com/docs/timesheet_demo.shtml<<
>>Get free COBOLExplorer at http://goreliance.com/download-products <<
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of Mark Aisenberg
> Sent: Friday, October 11, 2002 2:15 PM
> To: [EMAIL PROTECTED]
> Subject: RE: [Boston.pm] Calling regex gurus ..A regex question..
>
>
> Your '\1' question aside:
> Your solution requires you to know the number of patterns in
> the string. For long strings, a regex could be slow. Why not
> just 'split' on whitespace into an array and then use array
> indices to easily extract the items you want?
>
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
> On Behalf Of Ranga Nathan
> Sent: Friday, October 11, 2002 1:42 PM
> To: [EMAIL PROTECTED]
> Subject: [Boston.pm] Calling regex gurus ..A regex question..
>
>
> I need to parse a string that has multiple occurrences of a
> pattern that is determined by an embeded count. For example:
>
> 02 s1n1 s1n2 3 s2n1 s2n2 s2n3 1 s3n1 4 s4n1 s4n2 s4n3 s4n4
>
> 02 is the count and I need to extract s1n1 and s2n2
>
> 3 is the count and I need to extract s2n1, s2n2 and s2n3
>
> And so on.
>
> So I tried to do:
> $var =
> /(.*?)\s+((?:.*?\s+){\1})(.*?)\s+((?:.*?\s+){\3})(.*?)\s+((?:.
> *?\s+){\5}
> )/;
>
> And was expecting "02" "s1n1 s1n2 " "3" "s2n1 s2n2 s2n3 " "1"
> "s3n1 " "4" "s4n1 s4n2 s4n3 s4n4 " as matches.
>
> This does not work.
> The \1, \2 etc are not evaluated as 'iterators'. I tried the
> experimental ?{} too.
>
>
>
> ---Closing information gaps-----
> Ranga Nathan, Reliance Technology
> >>SEVIS solution now! http://goreliance.com
> >>Live demo at http://any2xml.com/docs/timesheet_demo.shtml<<
> >>Get free COBOLExplorer at http://goreliance.com/download-products <<
>
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