SISMEMBER

Syntax

SISMEMBER key member

Time complexity: O(1)

Returns if member is a member of the set stored at key.

Return

Integer reply, specifically:

• 1 if the element is a member of the set.
• 0 if the element is not a member of the set, or if key does not exist.

Examples

dragonfly> SADD myset "one"
(integer) 1
dragonfly> SISMEMBER myset "one"
(integer) 1
dragonfly> SISMEMBER myset "two"
(integer) 0