SISMEMBER

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Synopsis

SISMEMBER key member_valueThis 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 key is associated with a value that is not a set, an error is raised.
• If the key does not exist, its associated set is empty, and the command returns 0.
• If the member belongs to the given set, an integer of 1 is returned.

Return Value

Returns 1 if the specified member exists. Returns 0 otherwise.

Examples

You can do this as shown below.

$ SADD yuga_world "America"

1

$ SISMEMBER yuga_world "America"

1

$ SISMEMBER yuga_world "Moon"

0

See Also

sadd, scard, smembers, srem