SISMEMBER

Attention

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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 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.

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

$ SADD yuga_world "America"

$ SISMEMBER yuga_world "America"

$ SISMEMBER yuga_world "Moon"