The article translates a former Python article about design patterns (Factory, Proxy, Template Method) to Ruby and introduces the following additional patterns: Singleton, Visitor and Observer. The reader gains some knowlege how Ruby works internally, for example, that class bodies contain executable code and are executed in the context of class Module or that method_missing is called for unknown methods, and so on…

Sorry, but the article is in German.

www.linuxenterprise.de/itr/online_artikel/psecom,id,407,nodeid,9.html