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Clean Architecture cheat sheet & developer notes

Clean Architecture cheat sheet and 2 curated developer notes — core concepts, patterns, and interview prep. Maintained by the DevRecall team.

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01 · Clean Architecture

The Layers & the Dependency Rule

The Layers & the Dependency Rule. The Goal. Organize code so business logic (Entities, Use Cases) is independent of frameworks, databases, and UI — making the core easier to test and change without being tied to any spec…

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02 · Clean Architecture

Testability, Tradeoffs & Common Pitfalls

Testability, Tradeoffs & Common Pitfalls. Why This Enables Fast Tests. Because business logic only depends on abstractions, Use Cases can be unit-tested with in-memory fakes for the repository interface — no real databas…

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TypeScriptgeneral

Interview Questions

TypeScript Interview Questions. Comprehensive TypeScript interview questions covering type system, generics, utility types, and best practices:. Fundamentals. 1. What is TypeScript?. TypeScript is a…

Mar 28, 2026

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TypeScriptgeneral

Advanced Types (Generics & Utility Types)

TypeScript Advanced Types. Generics. // Generic function function identity<T>(arg: T): T { return arg; } const num = identity<number>(42); // Explicit const str = identity('hello'); // Inferred //…

Mar 3, 2026

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