redis 数据结构

10.3 集合 -set（无序,元素具有唯一性）

10.3.1 添加

    命令:sadd key value    测试：    127.0.0.1:6379> sadd gender male female    (integer) 2    127.0.0.1:6379> sadd gender yoa yoa     (integer) 1

10.3.2 查看

    命令：smembers key    测试：    127.0.0.1:6379> smembers gender    1) "male"    2) "female

10.3.3 删除

    命令：srem key value    测试：    127.0.0.1:6379> srem gender male    (integer) 1    127.0.0.1:6379> smembers gender    1) "female"

10.3.4 随机取出set中的指定数量的值，并删除集合中的元素

    命令：spop key num    测试：    127.0.0.1:6379> sadd zimu a b c d e f g     (integer) 7    127.0.0.1:6379> spop zimu    "e"    127.0.0.1:6379> smembers zimu    1) "c"    2) "b"    3) "d"    4) "a"    5) "g"    6) "f"    127.0.0.1:6379> spop zimu 2    1) "f"    2) "b"    127.0.0.1:6379> smembers zimu    1) "c"    2) "d"    3) "a"    4) "g"    127.0.0.1:6379> spop zimu 3    1) "g"    2) "c"    3) "a"    127.0.0.1:6379> smembers zimu    1) "d"

10.3.5 随机取出set中的指定数量的值，但不删除集合中的元素

    命令：srandmember key num    测试：    127.0.0.1:6379> sadd zimu a b c d e f g    (integer) 6    127.0.0.1:6379> srandmember zimu     "a"    127.0.0.1:6379> smembers zimu    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"    127.0.0.1:6379> srandmember zimu 3    1) "b"    2) "f"    3) "g"    127.0.0.1:6379> smembers zimu    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"

10.3.6 查看集合中是否存在某一个元素

    命令：sismember key value    存在返回1，不存在返回0    测试：    127.0.0.1:6379> smembers zimu    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"    127.0.0.1:6379> sismember zimu a    (integer) 1    127.0.0.1:6379> sismember zimu l    (integer) 0

10.3.7 查看集合中元素的个数

    命令：scard key    测试：    127.0.0.1:6379> smembers zimu    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"    127.0.0.1:6379> scard zimu    (integer) 7

10.3.8 将一个集合中元素移动到另外一个集合中

    命令:smove src dest value    测试：    127.0.0.1:6379> smembers zimu    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"    127.0.0.1:6379> smove zimu zimu1 c    (integer) 1    127.0.0.1:6379> smembers zimu    1) "e"    2) "b"    3) "d"    4) "g"    5) "f"    6) "a"    127.0.0.1:6379> smembers zimu1    1) "c"    127.0.0.1:6379> scard zimu    (integer) 6    127.0.0.1:6379> scard zimu1    (integer) 1    127.0.0.1:6379> smove zimu zimu1 l    (integer) 0    127.0.0.1:6379> scard zimu    (integer) 6    127.0.0.1:6379> scard zimu1    (integer) 1    127.0.0.1:6379> smembers zimu    1) "e"    2) "b"    3) "d"    4) "g"    5) "f"    6) "a"    127.0.0.1:6379> smembers zimu1    1) "c"

10.3.9 求集合的交集

    命令：sinter key1 key2 key3 ...    测试：    127.0.0.1:6379> sadd lisi a b c d e    (integer) 5    127.0.0.1:6379> sadd wang a c d f g    (integer) 5    127.0.0.1:6379> sadd zhang c d f k j    (integer) 5    127.0.0.1:6379> sinter lisi wang zhang    1) "c"    2) "d"

10.3.10 求集合的并集

    命令：sunion key1 key2 key3 ...    测试：    127.0.0.1:6379> sunion lisi wang zhang    1) "d"    2) "b"    3) "g"    4) "f"    5) "a"    6) "j"    7) "k"    8) "e"    9) "c"

10.3.11 求集合的差集

    命令：sdiff key1 key2 key3 ...    测试：    127.0.0.1:6379> sdiff lisi wang    1) "b"    2) "e"    127.0.0.1:6379> sdiff wang lisi    1) "g"    2) "f"    127.0.0.1:6379> sdiff wang lisi zhang    1) "g"      

10.3.12 求集合的交集并存储

    命令：sinterstore dest key1 key2 ....    测试：    127.0.0.1:6379> sinterstore destinter lisi wang    (integer) 3    127.0.0.1:6379> smembers destinter    1) "c"    2) "d"    3) "a"

10.3.13 求集合的并集并存储

    命令：sunionstore dest key1 key2 ...    测试：    127.0.0.1:6379> sunionstore destunion lisi wang    (integer) 7    127.0.0.1:6379> smembers destunion    1) "c"    2) "e"    3) "b"    4) "d"    5) "g"    6) "f"    7) "a"

10.3.14 求集合的差集并存储

    命令：sdiffstore dest key1 key2 ...    测试：    127.0.0.1:6379> sdiffstore destdiff lisi wang    (integer) 2    127.0.0.1:6379> smembers destdiff    1) "b"    2) "e"