SISMEMBER

Syntax

  1. 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

  1. dragonfly> SADD myset "one"
  2. (integer) 1
  3. dragonfly> SISMEMBER myset "one"
  4. (integer) 1
  5. dragonfly> SISMEMBER myset "two"
  6. (integer) 0