LPUSHX key element [element …]

Time complexity: O(1) for each element added, so O(N) to add N elements when the command is called with multiple arguments.

Inserts specified values at the head of the list stored at , only if already exists and holds a list. In contrary to LPUSH, no operation will be performed when does not yet exist.

redis> LPUSH mylist "World"

redis> LPUSHX mylist "Hello"

redis> LRANGE mylist 0 -1

redis> LRANGE myotherlist 0 -1