Question 1

What are design patterns and why should I learn them?

Accepted Answer

Design patterns are proven, reusable solutions to common software engineering problems that every senior developer should know. Learning design patterns helps you write cleaner, more maintainable code and is essential for advancing to senior engineering roles. The 17 essential patterns from the Gang of Four (GoF) book cover creational, structural, and behavioral categories. Our interactive IDE lets you practice them hands-on, similar to how freeCodeCamp teaches web development.

Question 2

How does spaced repetition help learn design patterns?

Accepted Answer

Spaced repetition is a scientifically-backed learning technique that reviews material at increasing intervals (3, 7, 14, and 30 days). This moves patterns from short-term to long-term memory so you remember them permanently.

Question 3

What programming language is used in the interactive IDE?

Accepted Answer

All lessons use TypeScript with an interactive in-browser IDE — similar to freeCodeCamp or LeetCode. You write real code, get instant feedback, and can run tests directly in the editor. No local setup required.

Question 4

How much does it cost?

Accepted Answer

Master Design Patterns costs a one-time payment of $8 for lifetime access. No subscriptions, no hidden fees.

Question 5

What design patterns are covered in the course?

Accepted Answer

The course covers 17 Gang of Four design patterns across three categories: Creational (Singleton, Prototype, Builder, Factory, Abstract Factory), Structural (Facade, Bridge, Composite, Decorator, Adapter), and Behavioral (Observer, Iterator, Strategy, Template Method, Command, State, Chain of Responsibility). Plus 9 OOP/SOLID foundation lessons and 7 bonus cryptography lessons. Each pattern is taught through hands-on coding challenges in an interactive IDE.