scalaz.stream.mongodb.aggregate
wraps http://docs.mongodb.org/manual/reference/aggregation/group/#pipe._S_group
Identity (_id) document for $group operation
_id
computed fields ($sum, $avg ...)
computed fields ($sum, $avg .
wraps http://docs.mongodb.org/manual/reference/aggregation/group/#pipe._S_group
Identity (
_id
) document for $group operationcomputed fields ($sum, $avg ...)