General · Learning hub

Swagger cheat sheet & developer notes

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

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01 · Swagger

OpenAPI Documents, Swagger UI & Editor

OpenAPI Documents, Swagger UI & Editor. Swagger → OpenAPI. "Swagger" was the original name for the tooling; the specification itself is now formally the OpenAPI Specification (OAS). "Swagger" persists as the tooling bran…

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02 · Swagger

Design-First, Codegen & Keeping the Spec Honest

Design-First, Codegen & Keeping the Spec Honest. Design-First vs. Code-First. Design-first: write the spec before/independent of implementation — an upfront contract teams agree on. Code-first: generate the spec from exi…

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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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