From: Scott Gonyea <scott@...>
Date: 2010-11-11T11:22:22+09:00
Subject: Re: Total string length regex

My guess is, you're wanting to check the total length of what they entered...  As the length of their username must be (for example) between 5 and 20 characters long?

If so, I'd say you're making things needlessly complex.

min = 5
max = 20

# ...
user_name = params[:user_name]

return false unless( 
                (min..max).include?(user_name.length)     # check size
            and user_name =~ /^\w/                        # must start with word-character
            and user_name =~ /\w$/                        # must end with word-character
            and user_name !~ /\W\W/)                      # no two non-word-characters together

User.create(user_name)

On Nov 10, 2010, at 6:04 PM, Shea Barton wrote:

> So I have a complicated regex, and I need to have a condition that
> checks the total number of characters in a string, on top of the other
> conditions.
> 
> (this is for a username, to make sure they don't put more than one
> special character in a row)
> 
> /^\w(?:\w*(?:[-\.]\w+)?)*$/
> 
> How would I limit the total string length for this regex to be between x
> and y characters?
> 
> thanks
> 
> -- 
> Posted via http://www.ruby-forum.com/.
>