Cemre :
I can calculate the moving average of a simple integer list easily like:
Integer arr[] = {1, 2, 3, 4, 5, 6};
Observable<Integer> oi = Observable.from(arr);
oi.buffer(24, 1).subscribe(x -> average(x))
Now lets say that I have objects instead of integers like
private class Model{
public String key;
public Double value;
}
where I want to group and calculate the moving average based on key in a non-blocking fashion (i.e. I am getting a continuous stream from rabbitmq) in way that will emit {key->average} values.
I am aware of the groupBy operator but things get messy when I use it. What is the best way to do this with groupBy ?
Héctor :
You can do this:
Observable<Model> oi = ...;
oi.groupBy(model -> model.key)
.flatMapSingle(Observable::toList)
.subscribe(modelsGrouped -> { // key: modelsGrouped.get(0).key
double avg = average(modelsGrouped);
//...
});
Hope it helps!
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