SISMEMBER

Determines whether a member belongs to a set.

Usage: SISMEMBER key member
Complexity: O(1)
Since: 1.0.0
ACL Categories: @fast, @read, @set
Command flags: READONLY, FAST

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

Examples

127.0.0.1:6379> SADD myset "one"
(integer) 1
127.0.0.1:6379> SISMEMBER myset "one"
(integer) 1
127.0.0.1:6379> SISMEMBER myset "two"
(integer) 0

Replies

RESP2

One of the following:

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

RESP3

One of the following:

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