Now that  ActionScript is reengineered from top to bottom as a true  object-oriented programming (OOP) language, reusable design patterns are  an ideal way to solve common problems in Flash and Flex applications.  If you’re an experienced Flash or Flex developer ready to tackle  sophisticated programming techniques with ActionScript 3.0, this  hands-on introduction to design patterns is the book you need. 
ActionScript  3.0 Design Patterns takes you step by step through the process, first  by explaining how design patterns provide a clear road map for  structuring code that actually makes OOP languages easier to learn and  use. You then learn about various types of design patterns and construct  small abstract examples before trying your hand at building  full-fledged working applications outlined in the book. Topics in  ActionScript 3.0 Design Patterns include:Key features of ActionScript 3.0 and why it became an OOP language
OOP characteristics, such as classes, abstraction, inheritance, and polymorphism
The benefits of using design patterns
Creational patterns, including Factory and Singleton patterns
Structural patterns, including Decorator, Adapter, and Composite patterns
Behavioral patterns, including Command, Observer, Strategy, and State patterns
Multiple design patterns, including Model-View-Controller and Symmetric Proxy designs
During the course of the book, you’ll work with examples of increasing complexity, such as an e-business application with service options that users can select, an interface for selecting a class of products and individual products in each class, an action game application, a video record and playback application, and many more. Whether you’re coming to Flash and Flex from Java or C++, or have experience with ActionScript 2.0, ActionScript 3.0 Design Patterns will have you constructing truly elegant solutions for your Flash and Flex applications in no time.
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