smove
SMOVE
Move a member from the source set to the destination set
Usage is smove source_key destination_key member.
The member is removed from the source set.
Example
| Command> | sadd src_key A B C |
| Result> | 3 |
| Command> | sadd dest_key D |
| Result> | 1 |
| Command> | smove src_key dest_key A
|
| Result> | 1 |
| Command> | smembers src_key
|
| Result> |
1) B
2) C A was removed from the source set
|
| Command> | smembers dest_key
|
| Result> |
1) A A was added to the destination set
2) D
|
 |
SMOVE is processed atomically. |
If the destination set does not exist, it is created and the member is added
Example
| Command> | del dest_key delete the destination set |
| Result> | 1 |
| Command> | smove src_key dest_key B
|
| Result> | 1 |
| Command> | smembers src_key
|
| Result> |
1) C
|
| Command> | smembers dest_key
the destination set was created and member B was added
|
| Result> |
1) B
|
If you specify a member that is not in the source set
Or if the source set itself does not exist, nothing happens and 0 is returned.
Example
| Command> | smove src_key dest_key X
|
| Result> | 0 |
| Command> | smove xxx_key dest_key X
|
| Result> | 0 |
View animation
Syntax
SMOVE source_key destination_key member
- Available since version 1.0.0.
- Time complexity is O(1).
Commands
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