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type-fns

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A set of types, type checks, and type guards for simpler, safer, and easier to read code.

github.com/ehmpathy/type-fns

ehmpathy/type-fns

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/** * ref: * - https://stackoverflow.com/a/67655609/3068233 * - https://stackoverflow.com/a/73409753/3068233 */ type BuildArrayWith<TCheck extends 'len' | 'min', // todo: support 'max' too? TLength extends number, TType, TCurrent extends TType[]> = TCurrent['length'] extends TLength ? TCheck extends 'len' ? [...TCurrent] : [...TCurrent, ...TType[]] : BuildArrayWith<TCheck, TLength, TType, [...TCurrent, TType]>; /** * declares a type of array with a check on its length */ type ArrayWith<TCheck extends 'len' | 'min', // todo: support 'max' too? TLength extends number, TType> = BuildArrayWith<TCheck, TLength, TType, []>;