SISMEMBER
Synopsis
SISMEMBER key member_value
This command is a predicate for whether or not a value is a member of a set that is associated with the given key.
- If the
keyis associated with a value that is not a set, an error is raised. - If the
keydoes not exist, its associated set is empty, and the command returns 0. - If the
memberbelongs to the given set, an integer of 1 is returned.
Return Value
Returns 1 if the specified member exists. Returns 0 otherwise.
Examples
$ SADD yuga_world "America"
1
$ SISMEMBER yuga_world "America"
1
$ SISMEMBER yuga_world "Moon"
0