From: Ghislain Mary <nospam@...>
Date: 2005-04-18T19:01:56+09:00
Subject: Modifying content in a file

Hi all,

I've written a little code that replaces some content in a file, but I 
really think there is a better way to do so. Here's my code:

def clean_file(filename)
   # Define the new caption
   caption = "caption: new caption"

   # Process the content of the file
   File.open(filename) do |from_file|
     File.open(filename + ".new", 'w') do |to_file|
       from_file.each do |line|
         case
           when line =~ /^caption:.*$/: line.sub!($&, caption)
         end
         to_file.print line
       end
     end
   end

   # Rename the file
   File.delete(filename)
   File.rename(filename + ".new", filename)
end

Can't it be done using the read-write mode on the file? Any better 
proposition is welcome ;)

Thanks.

Ghislain