From: Robert Klemme <bob.news@...>
Date: 2004-04-14T23:14:12+09:00
Subject: Re: embedded code construct a la perl


"Vince Forgetta" <vince.forgetta@staff.mcgill.ca> schrieb im Newsbeitrag
news:407D3FEC.6050707@staff.mcgill.ca...
> I want to find all nested pattern matches in a string, and execute some
> code at each match. This should include searching all nested substrings
> of a match. I realize I could do this in perl ( I have been up to now),
> but my code is getting quite complex and I would like to implement an
> object model (something I could also do in perl, but works much better
> in Ruby).  In perl, I was able to do this in a regexp (example below).
> Can I do the same thing in ruby, or will I need to use some sort of loop
> to wun code at each match.

As said, no code in Ruby regexps.  You'll have to do looping.

str.scan rx do |m|
  doForAllSubstringsOf m do |subString|
    puts subString
  end
end

The funny part is implementing doForAllSubstringsOf(str).  :-)  Well, it
isn't really difficult:

def doForAllSubstringsOf(str)
  len = str.length

  for i in 0 ... len
    for j in 1 ... len - i
      yield str[i, j]
    end
  end
end


Regards

    robert

>
> Thanks.
>
> Vince
>
>
> Robert Klemme wrote:
>
> >"Vince Forgetta" <vince.forgetta@staff.mcgill.ca> schrieb im
Newsbeitrag
> >news:407C1AD7.3040406@staff.mcgill.ca...
> >
> >
> >>Hi all,
> >>
> >>Is it possible to use embedded-code constructs in ruby regexp?
> >>
> >>Perl Example:
> >>
> >><code>
> >>
> >>"123"= ~ m{
> >>
> >>
> >
> >I guess, this should have read
> >"123" =~ m{
> >
> >
> >
> >>\d+
> >>(?{print "matched at [$'<$&>$']\n"})
> >>(?!)
> >>}x;
> >>
> >></code>
> >>
> >>Output:
> >>
> >>matched at [<123>]
> >>matched at [<12>3]
> >>matched at [<1>23]
> >>matched at [1<23>]
> >>matched at [1<2>3]
> >>matched at [12<3>]
> >>
> >>
> >
> >No.  If you let us know what you want to do mayve we can come up with
an
> >alternative solution.
> >
> >Regards
> >
> >    robert
> >
> >
> >
> >
> >
> >
>
>
> -- 
> Vincenzo Forgetta
>
>  Computational Biology
>   McGill University and Genome Quebec Innovation Centre
>   740 Dr. Penfield Avenue Room 7211
>   Montreal, Quebec Canada, H3A 1A4
>
>   Tel: 514-398-3311 00476
>   Email: vince.forgetta@staff.mcgill.ca
>
>
>