The Gang of Four (GoF) patterns are generally considered the foundation for all other patterns. They are categorized in three groups: Creational, Structural, and Behavioral. Here you will find information on these important patterns.
Creational Patterns
- 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
Structural Patterns
- 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
- Facade: A single class that represents an entire subsystem
- Flyweight: A fine-grained instance used for efficient sharing
- Proxy: An object representing another object
Behavioral Patterns
- Chain of Resp. : 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 the 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
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