From: Simon Strandgaard <neoneye@...>
Date: 2007-01-13T01:41:20+09:00
Subject: Re: DRY gsub...

On 1/12/07, Simon Strandgaard <neoneye@gmail.com> wrote:
> On 1/12/07, benjohn@fysh.org <benjohn@fysh.org> wrote:
[snip]
> > Out of interest, what does the ?: do in there? I've googled, etc, honest!
>
> (?: )   is a non-capturing group

example if you want to match a repeating pattern,
but don't want the repeating stuff in your output

"abcde xyx xyx xyx abcde".scan(/(?:xyx ){2,}.*(b.*d)/)
#=> [["bcd"]]



if you use ( ) then it shows up in the output

"abcde xyx xyx xyx abcde".scan(/(xyx ){2,}.*(b.*d)/)
#=> [["xyx ", "bcd"]]


-- 
Simon Strandgaard
http://opcoders.com/