The SCARD command returns the cardinality (i.e. number of items) of a Redis set.
http://redis.io/commands/scard
There is a similar command (ZCARD) for sorted sets.
Number of items in Redis set
The SCARD command returns the cardinality (i.e. number of items) of a Redis set.
http://redis.io/commands/scard
There is a similar command (ZCARD) for sorted sets.