module URI
class Array
class Redis
class Redis::Client
class Redis::Client::ThreadSafe
class Redis::CommandOptions
class Redis::Distributed
class Redis::Distributed::CannotDistribute
class Redis::HashRing
class Redis::Pipeline
class Redis::ProtocolError
class Redis::SubscribedClient
class Redis::Subscription
class RedisURLTest
class URI::Redis
redis
2.0.13
# zrank
def zrank(key, member) node_for(key).zrank(key, member) end