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Redis

LLEN key

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
redis> 
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