LPUSHX key element [element ...]
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.
Integer reply: the length of the list after the push operation.
>= 4.0: Accepts multiple
elementarguments. In Redis versions older than 4.0 it was possible to push a single value per command.
(integer) 1redis> LPUSHX mylist "Hello"
(integer) 2redis> LPUSHX myotherlist "Hello"
(integer) 0redis> LRANGE mylist 0 -1
1) "Hello" 2) "World"redis> LRANGE myotherlist 0 -1
(empty list or set)
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