Get next event in sequence every second with reactive-extensions

Question

I have the below types ...

public class NewsFeed
{
    public event EventHandler NewItem;

    .....

}

public class NewsItemEventA         


        

Answer 1

I couldn't get the answer from Asti to work. So I tried the undocumented Delay overload with the delayDurationSelector. I got it working for my problem, though somehow it's not behaving correctly when I use the scheduler in the timer, but it works without it:

public static IObservable DelayBetweenValues(this IObservable observable, TimeSpan interval,
    IScheduler scheduler)
{
        var offset =  TimeSpan.Zero;
        return observable
            .TimeInterval(scheduler)
            .Delay(ti =>
            {
                offset = (ti.Interval < interval) ? offset.Add(interval) : TimeSpan.Zero;
                return Observable.Timer(offset);
            })
            .Select(ti => ti.Value);
}