Behavioral Design Patterns
Behavioral design patterns define how objects communicate and interact. They clarify responsibilities between components and streamline communication, making code easier to extend and maintain.
The Observer Pattern
This pattern sets up a one-to-many dependency, so when one object changes state, all dependents are notified automatically. It's useful when changes in one object should trigger updates in others. For example, a notification system updating multiple components when a new message arrives.
example.pseudocode
The Strategy Pattern
It defines a family of algorithms, encapsulates them, and makes them interchangeable. It’s useful when behavior must change at runtime. For example, a sorting system choosing different algorithms based on data size or format.
example.pseudocode
The Command Pattern
Turns requests into objects, enabling them to be queued, logged, or undone. It’s common in GUIs and transactional systems. For example, a text editor where Cut, Copy, and Paste are encapsulated with undo/redo support.
example.pseudocode
The Iterator Pattern
This pattern provides a way to traverse a collection without exposing its internal representation. It's useful for lists, trees, or complex structures, keeping iteration logic separate from the data structure itself.
example.pseudocode
These patterns enhance flexibility and communication between components by separating concerns and defining reusable interaction strategies.
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Behavioral design patterns define how objects communicate and interact. They clarify responsibilities between components and streamline communication, making code easier to extend and maintain.
The Observer Pattern
This pattern sets up a one-to-many dependency, so when one object changes state, all dependents are notified automatically. It's useful when changes in one object should trigger updates in others. For example, a notification system updating multiple components when a new message arrives.
example.pseudocode
The Strategy Pattern
It defines a family of algorithms, encapsulates them, and makes them interchangeable. It’s useful when behavior must change at runtime. For example, a sorting system choosing different algorithms based on data size or format.
example.pseudocode
The Command Pattern
Turns requests into objects, enabling them to be queued, logged, or undone. It’s common in GUIs and transactional systems. For example, a text editor where Cut, Copy, and Paste are encapsulated with undo/redo support.
example.pseudocode
The Iterator Pattern
This pattern provides a way to traverse a collection without exposing its internal representation. It's useful for lists, trees, or complex structures, keeping iteration logic separate from the data structure itself.
example.pseudocode
These patterns enhance flexibility and communication between components by separating concerns and defining reusable interaction strategies.
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