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)))); }