sdiff

SDIFF

SDIFF key [key ...]

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 value

Array reply: list with members of the resulting set.

Examples