C# (CSharp) INotifyCollectionChanged.SelectChanges 예제들

예제 #1

 public static IObservable <NotifyCollectionChangedAction> SelectActions(this INotifyCollectionChanged notifyCollectionChanged)
 {
     return(notifyCollectionChanged
            .SelectChanges()
            .Select(x => x.Action));
 }

예제 #2

 public static IObservable <T> SelectOldItems <T>(this INotifyCollectionChanged notifyCollectionChanged)
 {
     return(notifyCollectionChanged
            .SelectChanges()
            .SelectMany(x => x.OldItems?.Cast <T>() ?? new T[] { }));
 }