redis LLEN command

length

英[leŋθ] 美[leŋθ]

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

Plural: lengths

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