View Source Skitter.BIO.KeyedReduce (Skitter v0.6.3)
Keyed Reduce operation.
This operation implements a reduce operation. It accepts three arguments wrapped in a tuple when
embedded inside a workflow: a key function, a reduce function and an initial state. When this
operation receives data, the key function is called with the received data as its first
argument. The key function should return a key, which is used to obtain the state associated
with the key. Afterwards, the reduce function is called with the received data as its first
argument and the state associated with the key returned by the key function as its second
argument. The function should then return a new state, which will be associated with the key.
The returned state will also be emitted on the _
out port.
operation-properties
Operation Properties
- in ports:
_
- out ports:
_
- default strategy:
Skitter.BIS.KeyedState