Here is what I'd like to do. anonymous_class = class.new; # somehow define methods on anonymous_class # somehow create an object of type anonymous_class And I'm running into a roadblock. I can create an anonymous class easily enough, I just can't figure out how to define methods on it. Like initialize. Or create objects of that type. Yes, I know about singleton classes, but they don't do what I want because I also want to create subclasses of these subclasses, and instances of these subclasses. As for why I want this, I'm trying to see whether I can figure out how to implement a decent prototype based class system in Ruby. A friend says that you can't. I thought that a clean way to do it would be to create an anonymous class, and create an object Prototype of that class. I would make sure that Prototype's new method would create a new class which is a subclass of Prototype's, and an object of that class with the prototype being the object that new was called on. And Prototype would have a def method which would define new methods in the class of the object that def was called on. And yes, I know I could do this by dynamically creating normal classes with calls to eval. But I'd prefer to avoid going there. Thanks, Ben -- Posted via http://www.ruby-forum.com/.