SMISMEMBER key member [member ...]
Returns whether each
member is a member of the set stored at
1 is returned if the value is a member of the set, or
0 if the element is not a member of the set or if
key does not exist.
Array reply: list representing the membership of the given elements, in the same order as they are requested.
(integer) 1redis> SADD myset "one"
(integer) 0redis> SMISMEMBER myset "one" "notamember"
1) (integer) 1 2) (integer) 0
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