[CodeGuru]C++ Design Pattern: What is a Design Pattern?

February 9th, 2005, 11:07 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 represent solutions to problems what arise when developing software within a particular context. 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 configuring 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 Façade: 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 notifying 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 01:00 PM.

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# 2     February 11th, 2007, 11:38 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