Sorcerean pairing function

/**
 * Sorcerean pairing function.
 *
 * @see @_sorceress
 */
export const pair = (k1: number, k2: number): number => (
    ((k1 > k2) ? k1 * k1 + k2 : k2 * (k2 + 2) - k1) | 0
);


/**
 * Inverse to the Sorcerean pairing function.
 *
 * @see @_sorceress
 */
export const depair = (z: number): [number, number] => {
    const w = Math.floor(z);
    const t = z - w * w;
    if(t > w) {
        return [2 * w - t, w];
    } else {
        return [w , t];
    }
}