February 9th, 2005, 12:07 PM
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.
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.
, The Timeless Way of Building
Patterns help you learn from other's successes, instead of your own failures.
(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:
Q: How can I quickly find information about a design pattern?
A: Here are some links on the web:
- Abstract Factory: Creates an instance of several families of classes
- Builder: Separates object construction from its representation
- Factory Method: Creates an instance of several derived classes
- Prototype: A fully initialized instance to be copied or cloned
- Singleton: A class of which only a single instance can exist
- Adapter: Match interfaces of different classes
- Bridge: Separates an object’s interface from its implementation
- Composite: A tree structure of simple and composite objects
- Decorator: Add responsibilities to objects dynamically
- Façade: A single class that represents an entire subsystem
- Flyweight: A fine-grained instance used for efficient sharing
- Proxy: An object representing another object
- Chain of Responsibility: A way of passing a request between a chain of objects
- Command: Encapsulate a command request as an object
- Interpreter: A way to include language elements in a program
- Iterator: Sequentially access the elements of a collection
- Mediator: Defines simplified communication between classes
- Memento: Capture and restore an object's internal state
- Observer: A way of notifying change to a number of classes
- State: Alter an object's behavior when its state changes
- Strategy: Encapsulates an algorithm inside a class
- Template Method: Defer the exact steps of an algorithm to a subclass
- Visitor: Defines a new operation to a class without change
Last edited by Andreas Masur; July 27th, 2005 at 02:00 PM.
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