- Usage:
-
LPUSHX key element [ element ... ]
- Complexity:
- O(1) for each element added, so O(N) to add N elements when the command is called with multiple arguments.
- Since:
- 2.2.0
Inserts specified values at the head of the list stored at key, only if key
already exists and holds a list.
In contrary to LPUSH, no operation will be performed when key does not yet
exist.
Examples
127.0.0.1:6379> LPUSH mylist "World"
(integer) 1
127.0.0.1:6379> LPUSHX mylist "Hello"
(integer) 2
127.0.0.1:6379> LPUSHX myotherlist "Hello"
(integer) 0
127.0.0.1:6379> LRANGE mylist 0 -1
1) "Hello"
2) "World"
127.0.0.1:6379> LRANGE myotherlist 0 -1
(empty array)
History
| Version | Change |
|---|---|
| 4.0.0 | Accepts multiple |