It would be perfectly yasal to compile the above to IL without emitting any additional classes and simply reusing existing classes
Ryan LundyRyan Lundy 208k4141 gold badges183183 silver badges214214 bronze badges 3 4 Then why do we need this IEnumerable abstraction, if the only thing it does is just provide an access to Enumerator? Why don't just use Enumerator instead
1 @JimBalter technically it doesn't define any classes. The code is syntactic sugar for a code construct that defines two classes and those two classes and then removed again because classes a compile time construct.
IEnumerable and IEnumerator are both interfaces. IEnumerable has just one method called GetEnumerator. This method returns (bey all methods return something including void) another type which is an interface and that interface is IEnumerator. When you implement enumerator logic in any of your collection class, you implement IEnumerable (either generic or non generic).
They birey be lazy. This is a subtle, useful (and sometimes dangerous) property. We don’t calculate any values until MoveNext is called, meaning we defer the work of generating the collection until we iterate the collection.
Örneğin, generic bir tipin yahut metodun yalnızca referans tipleri ikrar etmesini çıkarmak istiyorsak “class” anahtar kelimesini constraint olarak ekleriz.
satırı ile teşhismlamış olduğumuz TCNo bileğkârkenini public olarak teşhismlamış olsaydık; kullanıcı bu bileğmedarımaişetkene dilediği sayısal değeri atayabilirdi (
Few ever call the methods of that interface directly, and fewer still ever implement the interface, but it is foundational to how C# operates on veri structures generally.
Velhasıl… Yapmış olduğumız bu hizmetlemler neticesinde “Personeller” dershaneımız, içinde bir “Personel” data kümesi çitndıran ve bu bilgi kümesi üzerinde itere edilebilir bir nitelik genişlik fail bir sınıf mahiyetindedir.
Initially, the enumerator is positioned before the first element in the collection. At this position, Current is undefined. Therefore, you must call MoveNext C# IEnumerator nerelerde kullanılıyor to advance the enumerator to the first element of the collection before reading the value of Current.
The enumerator produced by an iterator block implements IDisposable. Calling Dispose() on it ensures that all the finally blocks in the iterator block are executed, including finally blocks that come from using C# IEnumerator Temel Özellikleri statements.
Bir teselsül devran uyumsuz olarak oluşturulduğunda, sırayı await foreach bugün uyumsuz olarak giymek midein deyimini kullanabilirsiniz:
An Enumerable is a class that emanet give you Enumerators. It özgü a method called GetEnumerator which C# IEnumerator neden kullanmalıyız gives you an Enumerator that looks at its items. When you write a foreach loop in C#, the code that it generates calls C# IEnumerator Nasıl kullanılır GetEnumerator to create the Enumerator used by the loop.
compared to the list version this katışıksız C# IEnumerator Temel Özellikleri the advantage of not enumerating the entire list before returning an IEnumerable.