Calculate the quotient and remainder of a division

type Quotient = number
type Remainder = number

/**
 * This function performs both division and modulo operation at the same time.
 * It returns the quotient and the remainder of the division of the dividend by
 * the divisor.
 *
 * @param {number} dividend - The number to be divided.
 * @param {Exclude<number, 0>} divisor - The number by which the dividend is to
 * be divided. This cannot be `0`
 * @returns {[number, number]} An array where the first element is the quotient
 * and the second element is the remainder.
 *
 * @example
 * divmod(10, 3)
 * // returns [3, 1]
 *
 * @example
 * divmod(12, 3)
 * // returns [4, 0]
 */
export const divmod = (
  dividend: number,
  divisor: Exclude<number, 0>,
): [Quotient, Remainder] => [Math.floor(dividend / divisor), dividend % divisor]