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redis ZREVRANK command

Chinese translationRecent Updates：2018-05-16 14:15:32

rev

英[rev] 美[rɛv]

n.<口>The rotation of the engine

vt.& vi .<口> (to cause) to accelerate; (to cause an increase in quantity, activity, etc.); (to make an engine) rotate rapidly; (to make) active

Third person singular: revs Plural: revs Present participle: revving past Formula: revved past participle: revved

rank

英[ræŋk] 美[ræŋk]

n. Military rank; class, level; order, Sequence; row and row

vt.& vi. Arrange, make horizontal row; classify...

vt. Arrange; exceed, be higher than; rank... .Located in; arranged horizontally; complaining; nitpicking, exposing wounds

adj. annoying; extreme; lush; stinky

Third person singular: ranks plural: ranks present participle: ranking past tense: ranked past participle: ranked comparative: ranker superlative: rankest

redis ZREVRANK command Video explanation

redis ZREVRANK command syntax

Function: Returns the ranking of member in the ordered set key. The members of the ordered set are sorted by decreasing score value (from large to small).

Syntax: ZREVRANK key member

Description: The ranking is based on 0, that is to say, the member with the largest score value is ranked 0. Use the ZRANK command to get the ranking of members in ascending order of score value (from small to large).

Available versions: >= 2.0.0

Time complexity: O(log(N))

Return: If member is a member of the ordered set key, return the ranking of member. If member is not a member of the ordered set key, return nil.

redis ZREVRANK command example

redis 127.0.0.1:6379> ZRANGE salary 0 -1 WITHSCORES     # 测试数据
1) "jack"
2) "2000"
3) "peter"
4) "3500"
5) "tom"
6) "5000"
redis> ZREVRANK salary peter     # peter 的工资排第二
(integer) 1
redis> ZREVRANK salary tom       # tom 的工资最高
(integer) 0

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