SDIFF

Syntax
SDIFF key [key ...]
Available since:
1.0.0
Time complexity:
O(N) where N is the total number of elements in all given sets.
ACL categories:
@read, @set, @slow,

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.

Return

Array reply: list with members of the resulting set.

Examples

SADD key1 "a" SADD key1 "b" SADD key1 "c" SADD key2 "c" SADD key2 "d" SADD key2 "e" SDIFF key1 key2
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