Ruby Object Model Diagram

It shows a snapshot of the detailed state of a system at a point in time thus an object diagram encompasses objects and their relationships which may be considered a special case of a class diagram or a.

Ruby object model diagram.

Object includes the kernel module so object has all the instance methods of kernel like puts gets exit. So if you re a ruby programmer you probably know that everything in ruby is an object. If you re a beginner you may want to look at a tutorial instead. Umlify uses yuml probably the most used uml textual tool to render the diagram.

Using class ancestors included modules and superclass diagram the object model of these several commonly used ruby classes. But another thing that s worth noting is ruby objects hierarchy. How does ruby internally represent and connect classes objects superclasses etc. It s true though everything in ruby is an object.

As part of my compiler project one of my imminent decisions is what object model to use and sine i like ruby it seemed a good time to go through ruby and look at the guts of the ruby object model if you ve dabbled in meta programming etc. This is not an easy task since as the author comments. When you write ruby code you are inside a main object that s why you can just write puts hello world instead of kernel puts hello world. Everything is an object or more precisely every box is this diagram is a basicobject.

Everything is an object. We now have a mental model for how ruby manages classes instances superclasses and modules but why does it matter. Hash array string integer and float. You can t get very far into ruby land without hearing that phrase.

Likewise a static uml object diagram is an instance of a class diagram. For ruby this post probably doesn t contain much new stuff for you. A diagram showing superclass and eigenclass links between ruby objects but not the module inclusion links is available at www atalon cz. Ruby s extreme decoupling and duck typing philosophy doesn t judge a class by its hierarchy.

This video taken from my ruby reloaded course digs deep into what s going. The interesting thing is how those objects are linked together and classified. Since ruby 1 9 its hierarchy is like this. You can open your irb console and see it for yourself by typing.

Differently from languages like java and c. Thus variables don t have a predefined type which conflicts with uml s static typed object model.