LLEN – Redis

始于1.0.0可用。

时间复杂度： O(1)

Returns the length of the list stored at key. If key does not exist, it is interpreted as an empty list and 0 is returned. An error is returned when the value stored at key is not a list.

返回值

Integer reply: the length of the list at key.

例子

redis> LPUSH mylist "World"

(integer) 1

redis> LPUSH mylist "Hello"

(integer) 2

redis> LLEN mylist

(integer) 2

LLEN key

返回值

例子