ZDIFF

Syntax

1. ZDIFF numkeys key [key ...] [WITHSCORES]

Time complexity: : O(L + K log K) worst case where L is the total number of elements in all the sets, and K is the size of the result set.

ACL categories: @read, @sortedset, @slow

This command is similar to ZDIFFSTORE, but instead of storing the resulting sorted set, it is returned to the client

Return

Array reply: the result of the difference (optionally with their scores, in case the WITHSCORES option is given).

Examples

1. dragonfly> ZADD zset1 1 "one"
2. (integer) 1
3. dragonfly> ZADD zset1 2 "two"
4. (integer) 1
5. dragonfly> ZADD zset1 3 "three"
6. (integer) 1
7. dragonfly> ZADD zset2 1 "one"
8. (integer) 1
9. dragonfly> ZADD zset2 2 "two"
10. (integer) 1
11. dragonfly> ZDIFF 2 zset1 zset2
12. 1) "three"