type-samurai/src/pow.d.ts

Advanced utility types for Typescript

import { IsEqual } from "./equal";
import { Mult } from "./mult";
import { Push } from "./push";

type _Pow<
  Num extends number,
  Factor extends number,
  CurrentProduct extends number = 1,
  Iteration extends unknown[] = []
> = IsEqual<Iteration["length"], Factor> extends true
  ? CurrentProduct
  : _Pow<Num, Factor, Mult<CurrentProduct, Num>, Push<Iteration, unknown>>;

/**
 * Returns the first integer parameter raised to factor of the second integer parameter
 *
 * @example
 * ```ts
 * // 100
 * type Result = Pow<10, 2>
 * ```
 */
export type Pow<Num extends number, Factor extends number> = _Pow<Num, Factor>;