Introduction
The Strategy pattern defines a family of algorithms, encapsulates them, and makes them interchangeable at runtime.
Real-Life Example
A GPS navigation app: Users can switch between different route calculation strategies (fastest, shortest, scenic) depending on their needs.
Pros
Allows dynamic selection of algorithms at runtime.
Reduces code duplication by encapsulating related behaviors.
Promotes the Open/Closed Principle.
Cons
Can introduce unnecessary complexity for simple cases.
May require multiple classes for different strategies.
When to Use It
When multiple algorithms need to be interchangeable (e.g., sorting, compression methods).
When avoiding conditional statements that select different behaviors.
Avoid when a single, fixed algorithm is sufficient.
Conclusion
Strategy provides flexibility but should be implemented thoughtfully to avoid excessive class proliferation.
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