public static IAsyncObservable <Decimal?> Average(this IAsyncObservable <Decimal?> source)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
return(Create <Decimal?>(observer => source.SubscribeSafeAsync(AsyncObserver.AverageNullableDecimal(observer))));
}
public static IAsyncObservable <Decimal?> Average <TSource>(this IAsyncObservable <TSource> source, Func <TSource, Task <Decimal?> > selector)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
return(Create <Decimal?>(observer => source.SubscribeSafeAsync(AsyncObserver.AverageNullableDecimal(observer, selector))));
}