William Sanders, Chandima Cumaranatunge's ActionScript 3.0 design patterns: [object-oriented PDF

By William Sanders, Chandima Cumaranatunge

ISBN-10: 0596528469

ISBN-13: 9780596528461

The recommendations during this booklet are nice for any Actionscript developer they usually completely clarify strategies through layout styles. i might suggest this e-book to any aspiring AS3 developer.

HOWEVER, there's such a lot of terrible error during this booklet. whereas the content material is remarkable, it kind of feels just like the editor used to be plastered while he placed this little activity jointly. In bankruptcy 7, it's virtually insufferable. phrases are passed over, code is passed over, sections are re-pasted into the publication often... it really is totally terrible. I maintain discovering myself getting disappointed attempting to learn this e-book simply because rather a lot is omitted and loads is repeated identically at the subsequent page!!!

All in all, in case you are attracted to studying layout styles (and they're very precious) purchase this ebook. The content material is superb, the editor could be fired from the universe.

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Extra info for ActionScript 3.0 design patterns: [object-oriented programming techniques]

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Example 1-12. flowers); } } } Encapsulation | 23 Using Encapsulation and Design Patterns This section on encapsulation has been fairly long. The reason for the attention to encapsulation is because of its importance to good OOP; it’s a crucial element in design patterns. Of the 24 original design patterns, only 4 have a class scope and the remaining 20 have an object scope. Rather than relying on inheritance (which is discussed in the next section), the great majority of design patterns rely on composition.

With an abstract class, you do not implement the class but instead subclass it, and then implement the subclass and its methods. Because of the abstract nature of at least some of the methods in the abstract class, you must override them. Using the override statement, an overridden class maintains its signature but can have its own unique details. You must be sure that the name, number, type of parameters, and the return type are the same. In other words, when you override a method from an abstract class, you treat the method exactly the same as an interface method.

We ourselves were surprised at how different design patterns brought out different perspectives on the same OOP concept and helped further clarify it. To get started, we’ll review the four basic OOP concepts: • Abstraction • Encapsulation • Inheritance • Polymorphism Each of these concepts needs reflection, and if you’re new to OOP, don’t worry about getting it right the first time. We go over these concepts time and again in the design pattern chapters. Abstraction In general, an abstraction is a model or ideal.

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ActionScript 3.0 design patterns: [object-oriented programming techniques] by William Sanders, Chandima Cumaranatunge


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