SPOP

Removes and returns one or more random elements from the set stored at key.

Syntax

SPOP key [count]

Available since: 1.0.0
Time complexity: O(1) for every call, O(N) for every element returned, where N is the number of elements returned.
ACL categories: @write, @set, @fast

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

SADD myset "member1" "member2" "member3"

Now, let's remove and return a random element from myset:

SPOP myset

This might output something like:

"member3"

Now, let's remove and return 2 random elements from myset:

SPOP myset 2

This might output something like:

1) "member1"
2) "member2"

Bulk string reply: the removed random element(s), or nil when count is specified and the key does not exist.