SISMEMBER

This page documents the preview (v2.21) version. Preview includes features under active development and is for development and testing only. For production, use the stable (v2024.1) version.

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.

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

See also

sadd, scard, smembers, srem