Moves a member from one set to another.
SMOVE
source
destination member
Move member
from the set at source
to the
set at destination
. This operation is atomic. In every
given moment the element will appear to be a member of
source
or destination
for
other clients.
If the source set does not exist or does not contain the specified
element, no operation is performed and 0
is returned.
Otherwise, the element is removed from the source set and added to the
destination set. When the specified element already exists in the
destination set, it is only removed from the source set.
An error is returned if source
or
destination
does not hold a set value.
One of the following:
Integer reply:
1
if the element is moved.
Integer reply:
0
if the element is not a member of source and no
operation was performed.
O(1)
@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 myotherset "three"
(integer) 1
127.0.0.1:6379> SMOVE myset myotherset "two"
(integer) 1
127.0.0.1:6379> SMEMBERS myset
1) "one"
127.0.0.1:6379> SMEMBERS myotherset
1) "three"
2) "two"
SADD, SCARD, SDIFF, SDIFFSTORE, SINTER, SINTERCARD, SINTERSTORE, SISMEMBER, SMEMBERS, SMISMEMBER, SPOP, SRANDMEMBER, SREM, SSCAN, SUNION, SUNIONSTORE.