From: Joel VanderWerf <vjoel@...>
Date: 2006-01-17T14:05:14+09:00
Subject: Re: Question about regular expression

Simon Strandgaard wrote:
> On 1/17/06, Eric Luo <eric.wenbl@gmail.com> wrote:
>> I need to hack out an regular expression, which will match "SNPB" without
>> matching "STR SNPB".
>> Since ruby 1.8.2 or 1.8.4 don't support the  lookbehind feature. what's the
>> workable regular expression
>> for ruby version 1.8.2?
> 
> tests = %w{SNPB STR\ SNPB}
> re = /(?<!STR )SNPB/
> tests.map{|t| t.match(re) }
> 
> #=> [#<MatchData:0x65704>, nil]
> 
> 
> ruby 1.8.2 (2004-11-03) [powerpc-darwin7.5.0]
> 
> 
> --
> Simon Strandgaard
> 

Simon, do you have oniguruma installed? This is what I get:

$ ruby -v -e '/(?<!STR )SNPB/'
ruby 1.8.4 (2005-12-24) [i686-linux]
-e:1: undefined (?...) sequence: /(?<!STR )SNPB/
-e:1: warning: useless use of a literal in void context

-- 
      vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407