IEnumerable至Observable的间隔

Question

To generate a "measure" every 5 sec I'm doing something like :

var Events = Observable.
    Interval(TimeSpan.FromSeconds(5)).
    Select(i => factory.GenerateRandomMeasure())

I would like to do the same but based on an existing Measure collection. I assume I have to do something like :

var Events = existingList.ToObservable();

But is It possible to do add an interval notion in order to get each list item with a interval? (one item every 5 sec for example)

Answer 1

You can do either of these which work just fine:

(1)

var Events =
    Observable
        .Interval(TimeSpan.FromSeconds(5))
        .Zip(existingList, (i, x) => x)
        .Select(i => factory.GenerateRandomMeasure());

(2)

var Events2 =
    Observable
        .Generate(
            0,
            x => x < existingList.Count,
            x => x + 1,
            x => existingList[x],
            x => TimeSpan.FromSeconds(5))
        .Select(i => factory.GenerateRandomMeasure());          

The first is probably more sensible and easier to write. The second is very much worth learning if you don't know it already as .Generate is very powerful and can be used in a lot of places.