[swift] 61. Set Union

Set Union

• 중복을 제거하고 set을 병합

let friendGroupA = ["철수", "영희", "멍멍", "야옹"]
let friendGroupB = ["철수", "영희", "짹짹", "우엉"]

let friendGroupASet = Set(friendGroupA)
let friendGroupBSet = Set(friendGroupB)

let totalFriend = friendGroupASet.union(friendGroupBSet)
//["철수", "영희", "멍멍", "야옹", "짹짹", "우엉"]