a = Set([1, 3, 5, 7])Set{Int64} with 4 elements:
5
7
3
17 Sets
union!(a, [2, 4, 6])Set{Int64} with 7 elements:
5
4
6
7
2
3
1a = Set([1, 3, 5, 7])Set{Int64} with 4 elements:
5
7
3
1union!(a, [2, 4, 6])Set{Int64} with 7 elements:
5
4
6
7
2
3
1