From: sabbyxtabby@... (Sabby and Tabby)
Date: 2003-11-26T03:52:11+09:00
Subject: Re: using variables in regular expressions

"Robert Klemme" <bob.news@gmx.net> wrote:

> "Damphyr" <damphyr@freemail.gr> schrieb im Newsbeitrag
> news:3FC2104E.7080607@freemail.gr...
> >
> > repo.collect!{|entry|
> > entry.gsub(/{variable_with_the root_I_want_to_substitute}/,"")
> > }
> 
> using gsub! is more efficient and better use %r{} because Regexp.quote
> does not quote "/":
> 
> repo.each {|entry|
>   entry.gsub!(%r{#{Regexp.quote(variable_with_the
> root_I_want_to_substitute)}},"")
> }

Don't need %r{}.  A slash "/" in interpolated variables is harmless.
Add anchor, unless removing root from middle of path is desirable.
Add /o modifier:

  entry.gsub!(/^#{Regexp.quote(root)}/o, "")