SDIFFSTORE

Syntax

1. SDIFFSTORE destination key [key ...]

Time complexity: O(N) where N is the total number of elements in all given sets.

ACL categories: @write, @set, @slow

This command is equal to SDIFF, but instead of returning the resulting set, it is stored in destination.

If destination already exists, it is overwritten.

Return

Integer reply: the number of elements in the resulting set.

Examples

1. dragonfly> SADD key1 "a"
2. (integer) 1
3. dragonfly> SADD key1 "b"
4. (integer) 1
5. dragonfly> SADD key1 "c"
6. (integer) 1
7. dragonfly> SADD key2 "c"
8. (integer) 1
9. dragonfly> SADD key2 "d"
10. (integer) 1
11. dragonfly> SADD key2 "e"
12. (integer) 1
13. dragonfly> SDIFFSTORE key key1 key2
14. (integer) 2
15. dragonfly> SMEMBERS key
16. 1) "b"
17. 2) "a"