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

redis> LPUSH mylist "World"
TBD
redis> LPUSHX mylist "Hello"
TBD
redis> LPUSHX myotherlist "Hello"
TBD
redis> LRANGE mylist 0 -1
TBD
redis> LRANGE myotherlist 0 -1

History

Starting with Redis version 4.0.0: Accepts multiple element arguments.