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All those types are actually child type of a single parent type: RBasic.

Since Ruby is written in C, the implementation doesn’t appear to be object oriented at first sight, even though it actually is (though in a very messy way, in my opinion). But let’s take a look how that’s implemented. This is how RClass and RFloat are defined:

Ruby uses a simple mark-and-sweep algorithm. It works as follows:





1. Mark all objects that are accessible from the current point of the Ruby program (mark phase).
2. Iterate through all objects and free those that are not marked (sweep phase).

Peter gave a presentation on metaprogramming.

You can find the slides of the presentation
on the brug rubyforge site

or watch the video of the presentation here.

• It didn‘t create any page to show you that default page (just a cool
  thing to see, that‘s all)
  
  
• There was nothing generated other than a log file
  
  
• Sinatra is a really cool name for a
  web-framework that‘s a DSL