In this post we are going to try to find nth root of x
where x and n are both numeric literal types
to do this, we need to utilize exponentiation type with a slight modification:
type CreateArrayWithLengthX< LENGTH extends number, ACC extends unknown[] = [], > = ACC['length'] extends LENGTH ? ACC : CreateArrayWithLengthX<LENGTH, [...ACC,1]> type Multiplication<X extends number, Y extends number, Z extends number[] = [], V extends unknown[] = []> = [...CreateArrayWithLengthX<Y>]['length'] extends Z['length'] ? V : Multiplication<X,Y,[1,...Z],[...CreateArrayWithLengthX<X>,...V]> type Exponentiation<X extends number, N extends number, Counter extends number[] =[], Acc extends unknown[] = [1]> = Counter['length'] extends N ? Acc // modified : Exponentiation<X, N, [1, ...Counter], Multiplication<Acc['length'],X> > ok, we have the building block now, let's do it
type Root <X extends number, N extends number, Counter extends number[] = []> = [...Exponentiation<Counter['length'], N>]['length'] extends X ? Counter['length'] : Root<X, N, [1,...Counter]> type A = Root<4,2> // 2 type B = Root<8,3> // 2 type C = Root<81,4> // 3 type D = Root<625,4> // 5 type E = Root<1024,10> // 2 type F = Root<2187,7> // 3 type G = Root<9261,3> // 21 limitation: X and N must be positive integers and only works with positive integer root. X cannot exceed 9,999 because the max tuple size is 9,999
X can exceed 999 if result^(N-1) is less than 1000
Warning, please insert the input one by one or else it will break the playground.
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