Composite Pattern Explained: Files, Folders, and Trees
Show notes for the Composite Pattern video — when to use it, real-world examples (file systems, the DOM, React trees), and a code-free mental model.
#oop
Object-oriented programming as a working tool: inheritance, composition, polymorphism, encapsulation, and where each one helps or gets in the way.
8 posts below, newest first.
Bridge Pattern Explained - Kill the Class Explosion | 10/25
Bridge Pattern - the fix for class hierarchies that explode into `RedCircle`, `BlueCircle`, `RedSquare`, `BlueSquare`.
Adapter Pattern Explained - The USB Adapter of Code | 9/25
Adapter Pattern - the software version of a USB-C to USB-A dongle. When two pieces of code need to talk to each other but their interfaces don't match, Adapter…
Singleton Pattern Explained - Anti-Pattern or Essential? | 8/25
Singleton Pattern - the most controversial design pattern in software. Half the developers call it an anti-pattern, the other half use it every day. So who's right?
Prototype Pattern - Clone Objects Instead of Rebuilding | 7/25
Prototype Pattern - when creating an object from scratch is expensive, clone an existing one instead. This is also where shallow-copy vs deep-copy bugs come from.
Builder Pattern - Stop Writing Huge Constructors | 6/25
Builder Pattern - stop writing constructors with 12 parameters. This is the cleanest way to construct complex objects step by step.
Abstract Factory Pattern - The 'Factory of Factories' Explained | 5/25
Abstract Factory Pattern explained with the matching-showroom analogy - the creational pattern for when you need to produce entire families of related objects together.
Factory Method Pattern vs Simple Factory Pattern - Finally Explained | 4/25
Factory Method Pattern vs Simple Factory Pattern - the exact difference most tutorials never make clear, and a classic software engineering interview question.
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Subjects that frequently appear alongside #oop. Click through to see every post on each one.
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The Gang-of-Four patterns reframed without the ceremony. When each pattern solves a real problem, when it is overkill, and the code smells that call for it.
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