From: William Crawford <wccrawford@...>
Date: 2006-09-23T01:56:43+09:00
Subject: Re: discovering the OS

dc wrote:
> if (windows)
>   system "start file.html"
> else if (mac)
>   system "open file.html"
  else
    puts "Oy, nevermind!  You can open it yourself!"
> end
> 

hehe

Found this on Google. 
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/47795

It looks like Config::CONFIG["arch"] is what you need to be looking at.

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