redis 集合操作

集合是去重的，无序的
127.0.0.1:6379> sadd skey ‘bai’
(integer) 1
127.0.0.1:6379> sadd skey ‘bai’ ‘xiao’ ‘yu’
(integer) 2
127.0.0.1:6379> scard skey
(integer) 3
127.0.0.1:6379> smembers skey
1) “yu”
2) “xiao”
3) “bai”
127.0.0.1:6379> srem skey ‘yu’ 移除指定元素
(integer) 1
127.0.0.1:6379> smembers skey
1) “xiao”
2) “bai”
127.0.0.1:6379> spop skey 随机弹出一个
“bai”
127.0.0.1:6379> smembers skey
1) “xiao”
127.0.0.1:6379>

127.0.0.1:6379> smembers skey2
1) “bai”
127.0.0.1:6379> smembers skey
1) “xiao”
127.0.0.1:6379> sdiff skey skey2
1) “xiao”
SINTER skey skey2 交集
(empty list or set)
127.0.0.1:6379>