Removes one or more members from a set. Deletes the set if the last member was removed.
SREM key member
[member…]
Remove the specified members from the set stored at key.
Specified members that are not a member of this set are ignored. If
key does not exist, it is treated as an empty set and this
command returns 0.
An error is returned when the value stored at key is not
a set.
Integer reply: the number of members that were removed from the set, not including non existing members.
O(N) where N is the number of members to be removed.
@fast @set @write
127.0.0.1:6379> SADD myset "one"
(integer) 1
127.0.0.1:6379> SADD myset "two"
(integer) 1
127.0.0.1:6379> SADD myset "three"
(integer) 1
127.0.0.1:6379> SREM myset "one"
(integer) 1
127.0.0.1:6379> SREM myset "four"
(integer) 0
127.0.0.1:6379> SMEMBERS myset
1) "two"
2) "three"member arguments.SADD, SCARD, SDIFF, SDIFFSTORE, SINTER, SINTERCARD, SINTERSTORE, SISMEMBER, SMEMBERS, SMISMEMBER, SMOVE, SPOP, SRANDMEMBER, SSCAN, SUNION, SUNIONSTORE.