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turbod/recursion.ts

Created February 11, 2024 12:01
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recursion.ts
type RgbTuple = Tuple<3, number>;
// ^? type RgbTuple = readonly [number, number, number]
const red: RgbTuple = [255, 0, 0];
type Tuple<Length, Type, Acc extends Type[] = []> = Acc["length"] extends Length
? Readonly<Acc>
: Tuple<Length, Type, [...Acc, Type]>;
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