set類型:無序不重複集合
1 設置和獲取
127.0.0.1:6379> sadd set2 v1 v2 v3 v3
(integer) 3
127.0.0.1:6379> smembers set2
1) "v1"
2) "v3"
3) "v2"
127.0.0.1:6379> spop set2
"v1"
2 是否存在member
127.0.0.1:6379> sismember set2 v2
(integer) 1
127.0.0.1:6379> sismember set2 v4
(integer) 0
3 set大小
127.0.0.1:6379> scard set2
(integer) 3
4 刪除元素
127.0.0.1:6379> srem set2 v2 v3
(integer) 2
5 隨機數
127.0.0.1:6379> smembers set1
1) "1"
2) "2"
3) "3"
4) "4"
127.0.0.1:6379> srandmember set1
"3"
127.0.0.1:6379> srandmember set1 2
1) "2"
2) "3"
6 交集 並集 差集
127.0.0.1:6379> sadd set2 2 3 5 6
(integer) 4
127.0.0.1:6379> SINTER set1 set2
1) "2"
2) "3"
127.0.0.1:6379> SUNION set1 set2
1) "1"
2) "2"
3) "3"
4) "4"
5) "5"
6) "6"
127.0.0.1:6379> SDIFF set1 set2
1) "1"
2) "4"