Advanced TypeScript
summary
Covers concrete TypeScript recipes: a generic List built around a Pizza class, using typeof person to lift literal types, using keyof to produce a union of property names, and a typed getProp pattern that enforces keys with K extends keyof T so misspellings surface and return types are inferred. Walks through mapped types—Partial, Readonly, Pick, Record—and shows how Object.freeze and JSON/stringify typings flow through generics in VS Code, all working end-to-end.
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