Ruby Object Model Diagram

Using class ancestors included modules and superclass diagram the object model of these several commonly used ruby classes.

Ruby object model diagram.

But another thing that s worth noting is ruby objects hierarchy. You can open your irb console and see it for yourself by typing. This video taken from my ruby reloaded course digs deep into what s going. Since 11 january 2012 there is a diagram containing module inclusion links.

Likewise a static uml object diagram is an instance of a class diagram. 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. 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.

Since ruby 1 9 its hierarchy is like this. Thus variables don t have a predefined type which conflicts with uml s static typed object model. Ruby s extreme decoupling and duck typing philosophy doesn t judge a class by its hierarchy. We now have a mental model for how ruby manages classes instances superclasses and modules but why does it matter.

If you re a beginner you may want to look at a tutorial instead. Everything is an object. Everything is an object or more precisely every box is this diagram is a basicobject. The interesting thing is how those objects are linked together and classified.

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. 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. How does ruby internally represent and connect classes objects superclasses etc.

A diagram showing superclass and eigenclass links between ruby objects but not the module inclusion links is available at www atalon cz. Object is an instance of a class in a particular moment in runtime that can have its own state and data values. It s true though everything in ruby is an object. Differently from languages like java and c.

For ruby this post probably doesn t contain much new stuff for you. You can t get very far into ruby land without hearing that phrase.