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.

Examples

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

RESP2 Reply

Array reply: a list with members of the resulting set.

RESP3 Reply

Array reply: a list with the members of the resulting set.
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