From: William James <w_a_x_man@...>
Date: 2005-07-29T10:01:01+09:00
Subject: Re: Sed -> Ruby : .. and ...

Keith Fahlgren wrote:

> sed:
> s/MATCH/GLOBAL REPLACEMENT/g
>
> ruby:
> #!/usr/bin/env ruby
>
> files = ARGV
>
> files.each do |arg|
>   f = File.open(arg)
>   puts "\nOpening file #{f}"
>   working_file = f.read
>
>   working_file.gsub!(/MATCH/,'GLOBAL REPLACEMENT')
>
>   puts "\nDoing ACTION in #{arg}"
>   f = File.new(arg, "w")
>   puts "\nWriting #{f} now"
>   f.print(working_file)
>   f.close
> end

Let Ruby change the file "in place".  A backup file with ".bak"
appended to the filename will be created.

#! ruby -i.bak -pl
gsub(/MATCH/,"REPLACEMENT")