- Usage:
SDIFF key [ key ...]
- Complexity:
- O(N) where N is the total number of elements in all given sets.
- Since:
- 1.0.0
Returns the members of the set resulting from the difference between the first set and all the successive sets.
For example:
key1 = {a,b,c,d}
key2 = {c}
key3 = {a,c,e}
SDIFF key1 key2 key3 = {b,d}
Keys that do not exist are considered to be empty sets.
Examples
SADD key1 "a"
SADD key1 "b"
SADD key1 "c"
SADD key2 "c"
SADD key2 "d"
SADD key2 "e"
SDIFF key1 key2