Builder, and Why Singleton Is Usually a Trap
Readable construction of complex objects — and global state disguised as a pattern. Lesson 4 of Level 4: Design Patterns. Based on Design Patterns.
Level 4 · Design Patterns · Lesson 4 of 13
Readable construction of complex objects — and global state disguised as a pattern.
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- Factory Method & Abstract Factory: Creating the Right Thing — Previous lesson
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All lessons in Design Patterns
- Patterns Are Answers to Recurring Pain
- Strategy: Pluggable Payment Methods
- Factory Method & Abstract Factory: Creating the Right Thing
- Builder, and Why Singleton Is Usually a Trap
- Adapter: Taming Third-Party Payment Gateways
- Decorator: Adding Behaviour Without Touching the Core
- Facade & Proxy: Simple Front Doors and Smart Stand-ins
- Observer: Reacting to Order Events
- Command: Refunds, Retries and Queued Work as Objects
- State: An Order Lifecycle Without the Giant Switch
- Template Method: One Checkout Skeleton, Many Variations
- Chain of Responsibility: Validation & Fraud Pipelines
- Composite, Bridge, Mediator, Iterator & Prototype