title: Compiling / building ruby online from a working rails application
body: <p>I'm totally new to Ruby but not to programming. All I did was going through <a href="http://TryRuby.org/" rel="nofollow">try ruby</a> and <a href="http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/" rel="nofollow">reading differences from other few languages</a> I know better (mostly PHP and some Python). So I have no idea how Rails differ from Ruby and maybe this is an absurd question.</p>
  
  <p>Anyways...</p>
  
  <ol>
  <li>I don't want (or am able) to install Ruby on my machine and I'd still like to build a single working source file. Is it possible to have an online compiler of some sort? If so, how?</li>
  <li>If I write a Rails web site (comprised of either one or many files) using any given host (that far I know I can), would I be able to use that same code with very minor modifications and just run as a Ruby app? Again, how?</li>
  <li><em>(new)</em> What about the other way around: a Ruby app turning into a Rails web page? Easy to do?</li>
  </ol>
  
  <p>I really hope for a "yes" on them all, but I doubt on the 1st and not so much on the last. :)</p>