value at the head of the list stored at
key, only if
exists and holds a list.
In contrary to
LPUSH, no operation will be performed when
key does not yet
@integer-reply: the length of the list after the push operation.
LPUSH mylist "World" LPUSHX mylist "Hello" LPUSHX myotherlist "Hello" LRANGE mylist 0 -1 LRANGE myotherlist 0 -1