OM
omegaui/design-patterns
Quick-reference guide to software design patterns with concise Dart examples.
⚡ Design Patterns under 1 min
Quick-reference guide to software design patterns with concise Dart examples.
🏗️ Creational
All about object instantiation.
| Pattern | Description |
|---|---|
| 🏭 Abstract Factory | Create families of related objects based on context |
| 🧱 Builder | Construct complex objects step by step |
| 🔨 Factory Method | Let subclasses decide which class to instantiate |
| ♻️ Object Pool | Reuse expensive objects instead of recreating them |
| 🐑 Prototype | Clone existing objects instead of building from scratch |
| 1️⃣ Singleton | Ensure a class has only one instance |
🧩 Structural
All about composing classes and objects.
| Pattern | Description |
|---|---|
| 🔌 Adapter | Make incompatible interfaces work together |
| 🌉 Bridge | Decouple abstraction from implementation |
| 🌳 Composite | Treat individual objects and groups uniformly |
| 🎀 Decorator | Add behavior dynamically without subclassing |
| 🏛️ Facade | Simplify a complex subsystem with one interface |
| 🪶 Flyweight | Share common state to save memory |
| 📦 Module | Encapsulate code with controlled public API |
| 🔒 Private Class Data | Restrict write access to class attributes |
| 🛡️ Proxy | Control access via a surrogate object |
🎭 Behavioral
All about communication between objects.
| Pattern | Description |
|---|---|
| ⛓️ Chain of Responsibility | Pass requests along a handler chain |
| 📝 Command | Encapsulate actions as objects with undo support |
| 🔤 Interpreter | Evaluate sentences in a language grammar |
| 🔄 Iterator | Access collection elements sequentially |
| 📡 Mediator | Centralize complex communication between objects |
| 💾 Memento | Capture and restore object state |
| 🚫 Null Object | Provide a do-nothing default to eliminate null checks |
| 👀 Observer | Notify dependents when state changes |
| 🔀 State | Change behavior when internal state changes |
| 🎯 Strategy | Swap algorithms at runtime |
| 📋 Template Method | Define algorithm skeleton, let subclasses fill in steps |
| 🚶 Visitor | Add operations to classes without modifying them |