From: Michael Selig <michael.selig@...>
Date: 2008-12-03T09:30:31+09:00
Subject: [ruby-core:20229] Re: \b and \B with Unicode

On Wed, 03 Dec 2008 11:06:55 +1100, Rados��aw Bu��at <radek.bulat@gmail.com>  
wrote:

> On Wed, Dec 3, 2008 at 12:46 AM, Dave Thomas <dave@pragprog.com> wrote:
>> #encoding: utf-8
>> p "  ���og ".match(/\b./u)    # =>  #<MatchData "o">
>>
>>
>> I was surprised that \b didn't find the boundary between the space and  
>> the
>> Unicode ��� character. Is that correct?
>
> Maybe ��� isn't treat as word character?
> "  ���og ".match(/\w/) => #<MatchData "o">
> I don't know if it should or not.
>

The character in question is Unicode U+2202 which is "Partial  
Differential". Though it looks like it might be a letter, it is NOT  
defined as a letter in Unicode (it is part of the "mathematical operators"  
block). So I think Ruby is correct here!

Cheers
Mike