The document discusses the strategy pattern, which defines a family of algorithms, encapsulates each one, and makes them interchangeable. This allows the algorithm to vary independently from clients that use it. The strategy pattern is applicable when there is a need for multiple classes that differ only in their behavior. It allows selecting different algorithms at runtime for common situations where classes vary by behavior.

1. Strategy PatternAlbert Guojunyuo@gmail.com

2. MotivationIntentImplementationApplicability & Examples2Agenda

3. There are common situations when classes differ only in their behavior. For this cases is a good idea to isolate the algorithms in separate classes in order to have the ability to select different algorithms at runtime. Motivation3

4. Define a family of algorithms, encapsulate each one, and make them interchangeable. Strategy lets the algorithm vary independently from clients that use it.4Intent

5. 5Implementation

6. 6Implementation – cont.

7. Applicability & Examples7

8. 8Applicability & Examples – cont.

9. 9Applicability & Examples – cont.

10. 10Applicability & Examples – cont.