C++ Design Pattern: What is a Design Pattern?

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Q: What is a Design Pattern?

A: Design Patterns represent solutions to problems what arise when developing software within a particular context.

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
  
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  • resource 2
• Factory Method: Creates an instance of several derived classes
  
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• Prototype: A fully initialized instance to be copied or cloned
  
  • resource 1
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• Singleton: A class of which only a single instance can exist
  
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  • resource 2

Structural Patterns

• Adapter: Match interfaces of different classes
  
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• Bridge: Separates an object’s interface from its implementation
  
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• Composite: A tree structure of simple and composite objects
  
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• Decorator: Add responsibilities to objects dynamically
  
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• Façade: A single class that represents an entire subsystem
  
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• Flyweight: A fine-grained instance used for efficient sharing
  
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• Proxy: An object representing another object
  
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Behavioral Patterns

• 　　Chain of Responsibility: A way of passing a request between a chain of objects
  
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• Command: Encapsulate a command request as an object
  
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• Interpreter: A way to include language elements in a program
  
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• Iterator: Sequentially access the elements of a collection
  
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• Mediator: Defines simplified communication between classes
  
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• Memento: Capture and restore an object‘s internal state
  
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• Observer: A way of notifying change to a number of classes
  
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• State: Alter an object‘s behavior when its state changes
  
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• Strategy: Encapsulates an algorithm inside a class
  
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• Template Method: Defer the exact steps of an algorithm to a subclass
  
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• Visitor: Defines a new operation to a class without change
  
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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

C++ Design Pattern: What is a Design Pattern?

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原文地址：http://www.cnblogs.com/UnGeek/p/4486023.html