SCARD
Syntax
SCARD key
- Available since:
- 1.0.0
- Time complexity:
- O(1)
- ACL categories:
-
@read,@set,@fast,
Returns the set cardinality (number of elements) of the set stored at key.
Return
Integer reply: the cardinality (number of elements) of the set, or 0 if key
does not exist.