Distribute Candies

LeetCode題目: 575. Distribute Candies

My solution:

/**
 * @param {number[]} candyType
 * @return {number}
 */
let distributeCandies = candyType => {
    const types = new Set(candyType);
    const halfCandy = candyType.length / 2;
    return types.size >= halfCandy ? halfCandy : types.size;
};