Design Patterns
The 22 classic Gang of Four patterns in three families (creational, structural, behavioral), explained with real-life analogies and short JavaScript examples.
6 lessons · about 0.5 hours
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- 01What Are Design Patterns? Design patterns are named, reusable solutions to problems that keep coming up in software design. Meet the three families and learn how to use patterns without overusing them.
- 02Creational Patterns: How to Make Objects Factory Method, Abstract Factory, Builder, Prototype and Singleton, each with a real-life analogy, a picture and a short JavaScript example.
- 03Structural Patterns: How to Connect Objects Adapter, Decorator, Facade, Proxy, Composite, Bridge and Flyweight. How to plug incompatible pieces together and build big structures from small ones.
- 04Behavioral Patterns I: Observer, Strategy, Command, State The four behavioral patterns you'll use most, explained with everyday analogies, diagrams and practical JavaScript.
- 05Behavioral Patterns II: Chain, Template, Iterator, Mediator, Memento, Visitor Six more behavioral patterns, from Express-style middleware chains to undo snapshots, each with a picture and a compact example.
- 06Which Pattern Do I Need? A problem-first guide for picking the right design pattern, telling look-alike patterns apart, and spotting when you don't need a pattern at all.