ZREVRANK

Syntax

  1. ZREVRANK key member

Time complexity: O(log(N))

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.

The optional WITHSCORE argument supplements the command’s reply with the score of the element returned.

Use ZRANK to get the rank of an element with the scores ordered from low to high.

Return

  • If member exists in the sorted set Integer reply: the rank of member.
  • If member does not exist in the sorted set or key does not exist Bulk string reply: nil.

Examples

  1. dragonfly> ZADD myzset 1 "one"
  2. (integer) 1
  3. dragonfly> ZADD myzset 2 "two"
  4. (integer) 1
  5. dragonfly> ZADD myzset 3 "three"
  6. (integer) 1
  7. dragonfly> ZREVRANK myzset "one"
  8. (integer) 2
  9. dragonfly> ZREVRANK myzset "four"
  10. (nil)