Design Patterns & Principles - Strategy Pattern

This is a part of a blogpost series listing the design principles and pattern definitions.

The Strategy Pattern

- defines a family of algorithms, encapsulates each one, and makes them interchangeable. Strategy lets algorithm vary independently from clients that use it.
Following are few principles adhered in this pattern

• Identify the aspect of your application that vary and separate them from what stays same.
• Program to interface not to an implementation
• Favor composition over inheritance

The example code for strategy pattern in Swift is available at my github repo.

courtesy: Head First Design Patterns