From: dblack@...
Date: 2006-09-03T21:22:25+09:00
Subject: Re: RegExp issues....

Hi --

On Sat, 2 Sep 2006, Eric Hodel wrote:

>
> On Sep 1, 2006, at 6:57 PM, Ben V. wrote:
>
>> I am trying to validate user input so it contains only letters, numbers,
>> underscores and dashes. I am using this regexp:/[A-Z0-9_-]/. However,
>> when I type in 'hello' in the field, it says that it doesn't match the
>> regexp, yet I'm sure that reg exp works for letters, numbers, and
>> underscores only. What am I doing wrong? Thanks for your help and time.
>
> That regexp doesn't match lowercase characters.
>
> input =~ /\A[\w-]+\Z/ is probably better.

\Z will allow a final newline character, though, so you'd probably
want to use \z.


David

-- 
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org