ES6 set 应用场景
1、数组去重
let arr = [3, 5, 2, 2, 5, 5];
let unique = [...new Set(arr)];
// [3, 5, 2]
2、并集(Union)、交集(Intersect)和差集(Difference)
let a = new Set([1, 2, 3]);
let b = new Set([4, 3, 2]);
// 并集
let union = new Set([...a, ...b]);
// Set {1, 2, 3, 4}
// 交集
let intersect = new Set([...a].filter(x => b.has(x)));
// set {2, 3}
// 差集
let difference = new Set([...a].filter(x => !b.has(x)));
// Set {1}
作者:孟繁贵 Email:meng010387@126.com 期待共同进步!