From: Robert Klemme <bob.news@...>
Date: 2004-01-11T23:01:39+09:00
Subject: Re: regex to NOT match?


"Alexander Kellett" <ruby-lists@lypanov.net> schrieb im Newsbeitrag
news:200401102209.22341.ruby-lists@lypanov.net...
> On Saturday 10 January 2004 21:57, Ruby Baby wrote:
> > Sorry it seems like the smallest thing, but I'm stuck on this.
> >
> > I'm trying to make a simple regex to strip away characters that are NOT
> > certain characters I name. I'm unclear on what Ruby uses as a "NOT"
match
> > in regex, like ! is for != (Or if it uses the ^, where does it put it?)
> >
> > EXAMPLE:
> >
> > myString = 'I want only the letters a and t and period.  When done it
> > should look like atttaatta.tatttaatta..'
> >
> > # this doesn't work of course:
> > puts myString.gsub(!/at\./, '')
>
> puts myString.gsub(/[^at.]/,'')

This is likely a bit more efficient since it does less replacement
operations:

myString.gsub!( /[^at.]+/, '' )

Regards

    robert