SMISMEMBER
Syntax
SMISMEMBER key member [member ...]
Time complexity: O(N) where N is the number of elements being checked for membership
ACL categories: @read, @set, @fast
Returns whether each member is a member of the set stored at key.
For every member, 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.
Return
Array reply: list representing the membership of the given elements, in the same order as they are requested.
Examples
dragonfly> SADD myset "one"
(integer) 1
dragonfly> SADD myset "one"
(integer) 0
dragonfly> SMISMEMBER myset "one" "notamember"
1) (integer) 1
2) (integer) 0