From: Ken Bloom <kbloom@...>
Date: 2006-12-07T14:00:11+09:00
Subject: Re: Why is this regex invalid?

On Thu, 07 Dec 2006 01:24:30 +0100, David Kastrup wrote:

> Christopher Schneider <cschneid@colostate.edu> writes:
> 
>> I'm pretty sure the dash needs to be escaped in regular expressions.   
>> The second one works since it is the last character in the character  
>> class, and hence isn't defining a range.
>>
>> /([0-9]*)([^\+\- ]+)(.*)/ should work - note the escaped dash.
> 
> Rubbish.  In character ranges, \ is not special.

It most certainly is special:
irb(main):014:0> /[a\+\- ]/=~".\\"
=> nil

-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/