Function pickOne

packages/procgen/src/random/Shuffle.ts:44–49

(array: readonly T[], rng: SeededRandom | { next(): number })

 * @returns @zh 随机元素 @en Random element
 */
export function pickOne<T>(array: readonly T[], rng: SeededRandom | { next(): number }): T {
    if (array.length === 0) {
        throw new Error('Cannot pick from empty array');
    }
    return array[Math.floor(rng.next() * array.length)];
}

/**
 * @zh 从数组中随机采样 N 个不重复元素