From: "lrlebron@..." <lrlebron@...>
Date: 2007-12-08T06:34:59+09:00
Subject: Re: changing a files' content

On Dec 4, 3:18 am, Paul Fox <olifoxp...@googlemail.com> wrote:
> hi all,
> i have a text file with various lines, and i want to alter some of these
> using regex and gsub.
>
> so i have patterns={/some_pattern/=>"replacement text"}
> and i'm thinking this:
> in = File.open(filename)
> while (line=in.gets)
>   if line.strip =~ pattern
>     line.gsub(pattern,patterns[pattern])
>   end
> end
>
> but i'm not sure if that's efficient? and of course, i'm struggling on
> the best way of writing those changes back into the file.
>
> any thoughts?
> thanks,
> f.
> --
> Posted viahttp://www.ruby-forum.com/.

I did something similar using the rio library. Cleaned up some vb
files in place

require 'rio'
rio('C://test').all.files('*.vb') do |f|
rio(f) <f.contents.gsub(/'UPGRADE.*\s/,"").gsub(/On Error GoTo
ErrHandler/,"Try").gsub(/ErrHandler:/,"Catch ex as Exception\n").gsub(/
Resume Next/,"End Try")
end