From: Florian Gross <flgr@...>
Date: 2004-01-12T02:52:07+09:00
Subject: Re: regex to NOT match?

Ruby Baby wrote:

> EXAMPLE:
> myString = 'I want only the letters a and t and period.  When done it should look like atttaatta.tatttaatta..'

irb(main):002:0> myString.tr("^at.", "")
=> "attttaata.tatttaatta.tatttaatta.."

Please notice that in regexps there is no general and easy way to not 
match a sub-pattern. (It's however possible to match stuff which isn't 
in a character class with [^abc] and there's exotic stuff like negative 
look-ahead which are very complex and not worth the effort most of the 
time.)

> Thanks! 

Regards,
Florian Gross