From: Clement Ow <clement.ow@...>
Date: 2008-06-25T13:59:44+09:00
Subject: Re: Regex extracting certain characters

Pe単a, Botp wrote:
> From: Clement Ow [mailto:clement.ow@asia.bnpparibas.com]
> # What I want to test for is actually just solely '/2008' which can be
> # anywhere in the path name, maybe citing some examples would
> # be clearer.
> # These are the kind of strings i want to test for:
> # C:/2008/ruby or C:/ruby/test/2008 or C:/ruby/test/2008/testing
> # These are the kind of strings that I want to eliminate:
> # C:/20080229/ruby or C:/ruby/test/20080502 or
> # C:/ruby/test/20080405/testing or C:/29022008/ruby
> # In other words, I want to just test for "/" followed by "2008" in a
> # given string.
> 
> the solutions given by Stefano are great. just try them.
> 
> i can show some other ways, eg
> 
> a
> #=> ["C:/2008/ruby", "C:/ruby/test/2008", "C:/ruby/test/2008/testing", 
> "C:/20080229/ruby", "C:/ruby/test/20080502", 
> C:/ruby/test/20080405/testing", "C:/29022008/ruby"]
> 
> a.grep /(^|\/)2008(\/|$)/
> #=> ["C:/2008/ruby", "C:/ruby/test/2008", "C:/ruby/test/2008/testing"]
> 
> and again, another non-regex way,
> 
> a.select{|path| path.split("/").any?{|x| x=="2008"}}
> #=> ["C:/2008/ruby", "C:/ruby/test/2008", "C:/ruby/test/2008/testing"]
> 
> btw, if you have "C:/ruby/2008/20080502", would you accept it?
> 
hmmm, for this string I might want to exclude.. Any ideas how it can be 
done using Regexp?

> it would also be nice if you could show sample code snippet of your 
> problem. remember, there are many ways ;)
> 
> kind regards -botp

Oh yea, cool ways there.. I used /(^|\/)2008(\/|$)/ in the end.. Thanks 
it works! =)
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