Distribute Candies LeetCode solution in JavaScript

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/**
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 * @param {number[]} candyType
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 * @return {number}
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 */
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var distributeCandies = function (candyType) {
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  const set = new Set();
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  candyType.map((e) => set.add(e));
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  return candyType.length / 2 > set.size ? set.size : candyType.length / 2;
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};