Learn Design Patterns Interactively
Master creational and behavioral patterns with interactive examples
13
Total Patterns
100%
Interactive
∞
Practice
Singleton
Creational
Ensure a class has only one instance
Factory Method
Creational
Create objects without specifying exact classes
Builder
Creational
Construct complex objects step by step
Abstract Factory
Creational
Create families of related objects
Prototype
Creational
Create objects by cloning prototypes
Observer
Behavioral
Notify multiple objects of state changes
Strategy
Behavioral
Interchangeable family of algorithms
Command
Behavioral
Encapsulate requests as objects
State
Behavioral
Change behavior based on internal state
Template Method
Behavioral
Define algorithm skeleton in base class
Adapter
Structural
Convert one interface into another
Bridge
Structural
Decouple abstraction from implementation
Composite
Structural
Part-whole tree structures
Flyweight
Structural
Share intrinsic state to save memory
Proxy
Structural
Control access to objects
Chain of Responsibility
Behavioral
Pass requests along a chain
Interpreter
Behavioral
Evaluate language sentences
Iterator
Behavioral
Uniform traversal interface
Mediator
Behavioral
Centralize collaborative logic
Memento
Behavioral
Save and restore object state
Visitor
Behavioral
Externalize operations on elements
Decorator
Structural
Add behavior dynamically via composition
Facade
Structural
Provide a unified simple interface
Pattern Name
Intent
Pattern intent will appear here...
Problem
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Solution
Solution approach will appear here...
Real-World Uses
- Use cases will appear here...
Implementation
// Code will appear here
Real Example
// Example will appear here
Try It Out
Output
Exercise Title
Exercise description will appear here...
Requirements:
Design Patterns Learning Hub
This interactive hub is a practical, hands-on way to learn the Gang of Four (GoF) design patterns. Each pattern includes a gentle overview, a production-style implementation, a real example, and a runnable playground. Use it to study, teach, or refresh patterns in minutes.
Development Roadmap
MVP ✅
Core patterns, playground, code highlighting
Creational ✅
All 5 creational patterns implemented
Behavioral + Structural (ongoing)
Full set of 23 GoF patterns with exercises
Enhancements
UML visuals, relationship maps, progress tracking
Contributions are welcome—add examples, exercises, or language ports. Let’s make patterns approachable and practical.