LPUSHX
Syntax
LPUSHX key element [element ...]
- Available since:
- 2.2.0
- Time complexity:
- O(1) for each element added, so O(N) to add N elements when the command is called with multiple arguments.
- ACL categories:
-
@write
,@list
,@fast
,
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
RESP2/RESP3 Reply
Integer reply: the length of the list after the push operation.History
- Starting with Redis version 4.0.0: Accepts multiple
element
arguments.