Behavioral Design Pattern: The Strategy Design Pattern

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Introduction

In the world of programming, it’s essential to write code that’s not only functional but also efficient, maintainable, and flexible. This is where design patterns come in handy. Design patterns are reusable solutions to common problems that occur in software design. One of these patterns is the Strategy design pattern. This pattern is a part of the behavioral design pattern group as it’s primarily concerned with communication between objects.

What is the Strategy Design Pattern?

The Strategy Design Pattern is a pattern that enables a strategy method to be selected at runtime. Rather than implementing a single algorithm directly, code receives runtime instructions regarding which in a family of methods to execute.

In other words, it allows us to choose the algorithm or strategy at runtime. The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable. It lets the algorithm vary independently from the clients that use it.

Use Case of the Strategy Design Pattern

Imagine a situation where you have to build a payment system for an e-commerce application which supports multiple payment methods like credit card…