sismember

sismember(set is member 判断一个值在集合中是否存在

127.0.0.1:6379> smembers testSet
1) "1"
2) "2"
3) "3"
4) "4"
5) "5"
6) "6"
7) "7"
8) "8"
9) "9"
127.0.0.1:6379> sismember testSet 1
(integer) 1
127.0.0.1:6379> sismember testSet 12
(integer) 0