I argued in the opposite direction so it's closer to the actual redis API, which takes count as an optional parameter.

from [SRANDMEMBER](http://redis.io/commands/srandmember)
"Return value
Bulk reply: without the additional count argument the command returns a Bulk Reply with the randomly selected element, or nil when key does not exist. Multi-bulk reply: when the additional count argument is passed the command returns an array of elements, or an empty array when key does not exist."