title: What's the difference between Ruby and JRuby?
body: <p>Can anyone please provide me in layman's terms the difference between developing a JRuby and a Ruby, Rails application?</p>
  
  <p>I use NetBeans as my Ruby on Rails IDE and every-time I create a project is asks me that question - and I don't really get the difference.  Are there any pro and cons?</p>