Skip to main content

SISMEMBER

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

Syntax​

SISMEMBER key member

Details​

  • Available since: 1.0.0
  • Time complexity: O(1)
  • ACL categories: @read, @set, @fast

Example​

Assume we have a set called myset with members "member1", "member2", and "member3":

SADD myset "member1" "member2" "member3"

Now, let's check if "member1" is a member of myset:

SISMEMBER myset "member1"

This will output:

(integer) 1

Now, let's check if "member4" is a member of myset:

SISMEMBER myset "member4"

This will output:

(integer) 0

RESP2/RESP3 Reply​

Integer reply: 1 if the member is a member of the set, 0 if the member is not a member of the set or if key does not exist.