From: Marnen Laibow-Koser <marnen@...>
Date: 2010-01-30T22:52:10+09:00
Subject: Re: How do I use a variable in a regexp search string?

Thomas Sawyer wrote:
> On Jan 29, 10:38�pm, Harry Kakueki <list.p...@gmail.com> wrote:
>> > I dont know how to use a variable in a regex searchstring.
>> > ruby seems to only handle hardcoded serachstring in
>> > regex's. � How do you do this. � My code is below.
>>
>> Does this help?
>>
>> str = "abcdef"
>> searchstring = "cd"
>> p str =~ /#{searchstring}/
> 
> You may need to escape:
> 
>   p str =~ /#{Regexp.escape(searchstring)}/

But note that #{} only makes sense if you're interpolating a variable 
into part of a regex -- say, /January #{year}/.  If the variable is the 
whole regex, then it's more sensible to do Regex.new(searchstring).


Best,
--
Marnen Laibow-Koser
http://www.marnen.org
marnen@marnen.org
-- 
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