Learned that when you work with event handlers of class properties you frequently run into issues of incorrect scope (pages 269270)
Discovered that you can correct scope issues with the Delegate.create() method (pages 270273)
Learned that good encapsulation means that classes are self-contained and don't reference global objects such as _root and _global (page 274)
Used composition to define a "has a" relationship between classes (pages 274276)
Enabled classes that act like movie clips but for which you don't have to have symbols (pages 276281)
Used event dispatching to design flexible applications (pages 281287)
