Redis Note7:Redis-Key—Set

1. Set

1.1 添加：SADD

127.0.0.1:6379[3]> SADD myset "hello"
(integer) 1
127.0.0.1:6379[3]> SADD myset "world"
(integer) 1
127.0.0.1:6379[3]> SADD myset "redis"
(integer) 1
# 查看指定set
127.0.0.1:6379[3]> SMEMBERS myset
1) "hello"
2) "world"
3) "redis"
# 判断某一个值是否在指定set
127.0.0.1:6379[3]> SISMEMBER myset hello
(integer) 1
127.0.0.1:6379[3]> SISMEMBER myset mongodb
(integer) 0

1.2 查看集合元素个数：SCARD

127.0.0.1:6379[3]> SCARD myset
(integer) 3

1.1 移除set中的指定元素：srem

127.0.0.1:6379[3]> srem myset hello
(integer) 1
127.0.0.1:6379[3]> SMEMBERS myset
1) "world"
2) "redis"

1.2 随机抽选出一个元素：SRANDMEMBER

# 随意抽出一个
127.0.0.1:6379[3]> SRANDMEMBER myset
"world"
# 随机抽出指定个数
127.0.0.1:6379[3]> SRANDMEMBER myset 2
1) "hello"
2) "redis"

1.3 随机移除元素：spop

127.0.0.1:6379[3]> spop myset
"redis"
127.0.0.1:6379[3]> SMEMBERS myset 
1) "hello"
2) "world"

1.4 移动：smove

127.0.0.1:6379[3]> SMEMBERS myset 
1) "hello"
2) "world"
3) "redis"
# 移动指定集合中元素，移动到另一个集合
127.0.0.1:6379[3]> smove myset myset2 "redis"
(integer) 1
127.0.0.1:6379[3]> SMEMBERS myset 
1) "hello"
2) "world"
127.0.0.1:6379[3]> SMEMBERS myset2
1) "redis"
127.0.0.1:6379[3]>

1.5 差集、交集、并集：SDIFF 、SINTER 、SUNION

127.0.0.1:6379[3]> SMEMBERS myset1
1) "b"
2) "a"
3) "c"
127.0.0.1:6379[3]> SMEMBERS myset2
1) "e"
2) "d"
3) "c"
# 差集
127.0.0.1:6379[3]> SDIFF myset1 myset2
1) "b"
2) "a"
# 交集
127.0.0.1:6379[3]> SINTER myset1 myset2
1) "c"# 并集
127.0.0.1:6379[3]> SUNION myset1 myset2
1) "a"
2) "e"
3) "c"
4) "b"
5) "d"