es6 Set的幾種使用場景

// 數組去重 let arr = [1, 1, 2, 3]; let unique = [... new Set(arr)]; let a = new Set([1, 2, 3]); let b = new Set([4, 3, 2]); // 並集 let union = [...new Set([...a, ...b])];

>>阅读原文<<