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SISMEMBER

Syntax​

SISMEMBER key member

Time complexity: O(1)

ACL categories: @read, @set, @fast

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