Introduction
This article introduces design patterns, reusable solutions to common software development problems. Design patterns help us structure our code and make it more maintainable.
Why Design Patterns?
- Maintainability: Software is constantly evolving. Design patterns help us write code that is easier to modify and update.
- Communication: Design patterns provide a common language for developers to discuss software design.
Types of Design Patterns
There are three main categories of design patterns:
- Creational Patterns: These patterns hide the details of object creation.
- Structural Patterns: These patterns focus on how classes and objects are structured and composed.
- Behavioral Patterns: These patterns define how objects interact with each other.
Examples
Singleton Pattern (Creational): This pattern ensures that only one instance of a class exists.
Bridge Pattern (Structural): This pattern separates an object's implementation from its interface.
Observer Pattern (Behavioral): This pattern allows objects to subscribe to events and be notified when they occur.
When to Use Design Patterns
Solve a specific problem: Use a design pattern when it directly addresses a problem you're facing.
Anticipate change: Use a design pattern for parts of your system that are likely to change frequently.
Conclusion
Design patterns are a valuable tool for any developer. They provide solutions to common problems, improve code maintainability, and promote better communication among developers.
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