Do you know how to write an internal DSL in Ruby?

Do you know how to write an internal DSL in Ruby?:

Ruby code blocks (called closures in other languages) are chunks of code between braces or between do- end that you can associate with method invocations, almost as if they were parameters. A Ruby block is a way of grouping statements, and may appear only in the source next to a method call; the block is written starting on the same line as the method call’s last parameter (or the closing parenthesis of the parameter list). The code in the block is not executed at the time it is encountered. Instead, Ruby remembers the context in which the block appears (the local variables, the current object, and so on) and then enters the method. Matz says that any method can be called with a block as an implicit argument. Inside the method, you can call the block using the yield keyword with a value. Blocks are not objects, but they can be converted into objects of class Proc . One way...

Full article: http://rubylearning.com/blog/2011/10/02/do-you-know-how-t...