Software Design Patterns and Principles - Part 9 (Composite Design Pattern)

Other Parts of This Series: Part 8: Software Design Patterns and Principles - Part 8 (Decorator Design Pattern) Composite Design Pattern (Photo Credit: Refactoring.guru) In this series, we try to explore software design patterns and principles. We will try to learn the well-known OOP design patterns one by one. In this part, we try to explore the composite design pattern. So let’s get started… Story One of my close bros, Siam, wants to create a quiz competition app. The feature of this app will be fantastic. Siam bro wants, in a running quiz competition, both a single individual player and multiple players as a team to participate. So the score will be calculated based on the player’s individual points and also his team members’ points (if any), and the leadership board will be updated based on that. Now Siam, bro, is in tension about how he will design and develop his code to tackle this complex, composite, hierarchical, and tree-like structure (team players’ connection). ...

November 11, 2025 Â· 7 min Â· Saiful Islam Rasel

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