There are three basic classifications of patterns: Creational, Structural, and Behavioral 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 in which only a single instance can exist
Note: The best way to remember Creational Pattern is by remembering ABFPS (Abraham Became First President of States).
Structural Patterns
- Adapter: Match interfaces of different classes
- Bridge: Separates an object’s abstraction 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
Note: To remember Structural Pattern best is (ABCDFFP)
Behavioral Patterns
- Mediator: Defines simplified communication between classes
- Memento: Capture and restore an object's internal state
- Interpreter: A way to include language elements in a program
- Iterator: Sequentially access the elements of a collection
- Chain of Resp: A way of passing a request between a chain of objects
- Command: Encapsulate a command request as an object
- State: Alter an object's behavior when its state changes
- Strategy: Encapsulates an algorithm inside a class
- Observer: A way of notifying change to a number of classes
- Template Method: Defer the exact steps of an algorithm to a subclass
- Visitor: Defines a new operation to a class without change
Note: Just remember Behavioral Pattern Music....... 2 MICS On TV (MMIICCSSOTV).
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