Returns the rank of member
in the sorted set stored at key
, with the scores
ordered from high to low.
The rank (or index) is 0-based, which means that the member with the highest
score has rank 0
.
Use ZRANK to get the rank of an element with the scores ordered from low to high.
返回值
- If
member
exists in the sorted set, Integer reply: the rank ofmember
. - If
member
does not exist in the sorted set orkey
does not exist, Bulk string reply:nil
.
例子
redis>
ZADD myzset 1 "one"
(integer) 1redis> ZADD myzset 2 "two"
(integer) 1redis> ZADD myzset 3 "three"
(integer) 1redis> ZREVRANK myzset "one"
(integer) 2redis> ZREVRANK myzset "four"
(nil)