- Usage:
-
LREM key count element
- Complexity:
- O(N+M) where N is the length of the list and M is the number of elements removed.
- Since:
- 1.0.0
count > 0: Remove elements equal toelementmoving from head to tail.count < 0: Remove elements equal toelementmoving from tail to head.count = 0: Remove all elements equal toelement.
Removes the first count occurrences of elements equal to element from the list
stored at key.
The count argument influences the operation in the following ways:
For example, LREM list -2 "hello" will remove the last two occurrences of
"hello" in the list stored at list.
Note that non-existing keys are treated like empty lists, so when key does not
exist, the command will always return 0.
Examples
127.0.0.1:6379> RPUSH mylist "hello"
(integer) 1
127.0.0.1:6379> RPUSH mylist "hello"
(integer) 2
127.0.0.1:6379> RPUSH mylist "foo"
(integer) 3
127.0.0.1:6379> RPUSH mylist "hello"
(integer) 4
127.0.0.1:6379> LREM mylist -2 "hello"
(integer) 2
127.0.0.1:6379> LRANGE mylist 0 -1
1) "hello"
2) "foo"