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redis LLEN command

Chinese translationRecent Updates：2018-05-16 11:15:57

length

英[leŋθ] 美[leŋθ]

n.Length, long; the length of time; (language) sound length; a paragraph, a section

Plural: lengths

redis LLEN command Video explanation

redis LLEN command syntax

Function: Return the length of the list key.

Syntax: LLEN key

Description: If key does not exist, key is interpreted as an empty list and 0 is returned. If key is not a list type, an error is returned.

Available versions: >= 1.0.0

Time complexity: O(1)

Return: The length of the list key.

redis LLEN command example

# 空列表
redis> LLEN job
(integer) 0
# 非空列表
redis> LPUSH job "cook food"
(integer) 1
redis> LPUSH job "have lunch"
(integer) 2
redis> LLEN job
(integer) 2

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