LPUSHX

LPUSHX

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.

Return

Integer reply: the length of the list after the push operation.

Examples

LPUSH mylist "World"
LPUSHX mylist "Hello"
LPUSHX myotherlist "Hello"
LRANGE mylist 0 -1
LRANGE myotherlist 0 -1

History

• Starting with Redis version 4.0.0: Accepts multiple element arguments.