.. include:: <s5defs.txt>

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Prototype-based Object-Orientation
==================================

What is an Object?
==================

What is an Object?
==================

An object consist of two elements:

 - State + Behaviour


Instances and Classes
=====================

typical ingredients of object-orientation:
   - classes (with methods)
   - instances (with attributes)
   - inheritance

Relationships between Objects
=============================

 - two types of arrows:

   - is-instance-of
   - inherits-from

 - types are special objects
 - object creation via type


Principles of Object-Orientation
================================

what if:

 1. Everything is an object
 2. Every object has a type (or class)

is replaced by...

Principles of Prototyped-based OO
=================================

 1. Everything is an object


Relationships between Objects (2)
=================================

 - Every object has one or more parents
 - anything can be a parent object
 - object creation via *cloning*