From: Logan Capaldo <logancapaldo@...>
Date: 2006-08-08T21:06:31+09:00
Subject: Re: porting perl regexp to ruby


On Aug 8, 2006, at 6:25 AM, niklasalverup@hotmail.com wrote:

> I have a perl regexp that strips c++ comments (I have not constructed
> this myself, found it here:
> http://www.perl.com/doc/FAQs/FAQ/oldfaq-html/Q4.27.html ). However, it
> uses the 'e' modifier that will take the replacement value and  
> evaluate
> it. How do I get similar functionality in ruby?
>
> perl regexp below:
> s#//(.*)|/\*[^*]*\*+([^/*][^*]*\*+)*/|"(\\.|[^"\\])*"|'(\\.|[^'\\]) 
> *'|[^/"']+#
>  $1 ? "/*$1 */" : $& #ge;
>
> /Nick
>
>


Look at the documentation for gsub. Specifically the block form.

e.g.:

string.gsub(/regex/) { |matched_string| code_to_evaluate }