Area 09 · 7 topics

Design Patterns

Patterns are vocabulary, not rules. Learn the problem each one solves, how it looks idiomatically in Go and JS, and the smell of using it when you shouldn’t.

Deep-dive ready

SOLID Principles

The five principles, with honest trade-offs.

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Deep-dive ready

Creational Patterns

Factory, Builder, Singleton — and Go’s functional options.

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Deep-dive ready

Structural Patterns

Adapter, Decorator, Proxy, Facade, Composite.

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Deep-dive ready

Behavioral Patterns

Strategy, Observer, Command, State, Chain of Responsibility.

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Deep-dive ready

Dependency Injection

Constructor injection, interfaces at the consumer, testing seams.

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Deep-dive ready

Go Idioms as Patterns

Accept interfaces, return structs; errors as values; embedding.

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Deep-dive ready

Anti-patterns

God objects, premature abstraction, shotgun surgery.

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