_TupleOf

type _TupleOf<
    Length extends number,
    Fill
> = number extends Length
    ? Fill[]
    : BuildTupleDigitByDigit<`${Length}`, Fill>;

type _TupleOf<
    Length extends number,
    Fill
> = number extends Length
    ? Fill[]
    : BuildTupleDigitByDigit<`${Length}`, Fill>;