[Codeguru] C ++ design pattern: What is a design pattern?

February 9th, 2005, AM

Http://www.codeguru.com/forum/showthread.php? T = 327982

C ++ design pattern: What is a design pattern? Q: What is a design pattern? A: Design patterns representSolutionsToProblemsWhat arise when developing software within a participantContext. Quote: Each pattern describes a problem which occurs over and over again in our environment, and then describes the core of the solution to that problem, in such a way that you can use this solution a million times over, without ever doing it the same way twice. C. Alexander,The timeless way of building, 1979 Quote: Patterns help you learn from other's successes, instead of your own failures. Mark Johnson(Cited by Bruce Eckel) Q: How many types of design patterns exist? A: Basically, there are three categories: Creational patterns: Deal With initializing and naming classes and objects Structural Patterns: Deal With decoupling the interface and implementation of classes and objects Behavioral patterns: Deal with dynamic interactions among societies of classes and objects Q: What are good books about design patterns. A: Here are some must-have books: Design patterns by Erich Gamma, Richard Helm, Ralph Johnson, John vlissides (also known as Gang of Four) Thinking in patterns with Java, by Bruce Eckel Thinking in patterns with C ++, by Bruce Eckel Q: How can I quickly find information about a design pattern? A: Here are some links on the web: General Design Patterns Creational patterns Abstract Factory: Creates an instance of several families of Classes Resource 1 Resource 2 Builder: Separates Object Construction from its representation Resource 1 Resource 2 Factory method: Creates an instance of several Derived classes Resource 1 Resource 2 Resource 3 Prototype: A fully initialized instance to be copied or cloned Resource 1 Resource 2 Singleton: A class of which only a single instance can exist Resource 1 Resource 2 Structural Patterns Adapter: Match interfaces of different classes Resource 1 Resource 2 Resource 1 Bridge: Separates an object's interface from its implementation Resource 1 Resource 2 Composite: A Tree Structure of simple and composite objects Resource 1 Resource 2 Resource 3 Decorator: Add responsibilities to objects dynamically Resource 1 Resource 2 Resource 3 Fa C Ade: A single class that represents an entire Subsystem Resource 1 Resource 2 Flyweight: A fine-grained instance used for efficient sharing Resource 1 Resource 2 Resource 3 Proxy: An object representing another object Resource 1 Resource 2 Behavioral patterns Chain of responsibility: A way of passing a request between a chain of Objects Resource 1 Resource 2 Command: Encapsulate a command request as an object Resource 1 Resource 2 Resource 3 Interpreter: A Way to include language elements in a program Resource 1 Resource 2 Iterator: Sequentially access the elements of a collection Resource 1 Resource 2 Mediator: Defines simplified communication between classes Resource 1 Resource 2 Memento: Capture and restore an object's internal state Resource 1 Observer: A way of changing Ying change to a number of classes Resource 1 Resource 2 Resource 3 State: Alter an object's behavior when its State Changes Resource 1 Resource 2 Resource 3 Strategy: Encapsulates an algorithm inside a class Resource 1 Resource 2 Resource 3 Template Method: Defer the exact steps of an algorithm to a subclass Resource 1 Resource 2 Resource 3 Visitor: Defines a new operation to a class without change Resource 1 Resource 2 Resource 3 Last edited by Andreas Masur; July 27th, 2005 at pm.

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#2 February 11th, 2007, AM

Adiian junior member   Join Date: Sep 2006 posts: 1

Re: C ++ design pattern: What is a design pattern? And more resources on (www.oodesign.com). Make sure you read the design principles, it's very usefull for understanding the desing patterns: OO design principles: Open Close Principle Dependency inversion principle Interface sergregation Principle Single Responsibility Principle Liskov's substitution principle Creational patterns: Singleton Factory Factory method Abstract Factory Builder Prototype Object pool Behavioral patterns: Chain of responsibility Command Interpreter Iterator Strategy Template Method Visitor