ES6:Set

數組去重javascript var mySet = new Set([1, 2, 3, 4, 4]);[...mySet]; // [1, 2, 3, 4] 並集java var a = new Set([1, 2, 3]); var b = new Set([4, 3, 2]); var union = new Set([...a, ...b]); // {1, 2, 3, 4} 交集we

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