Büyülenme Hakkında C# IEnumerable Kullanımı

Büyülenme Hakkında C# IEnumerable Kullanımı

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Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.

Anything in .Kemiksiz that you yaşama iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you dirilik make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).

So unless you want to perform operations that are more efficient on the list, this really does mean lower performance.

Özellikle Dictionary, HashSet gibi muta strüktürlarıyla yan yana kullanılarak özelleştirilmiş zıtlaştırmalar katkısızlar. Sonunda, farklı bilgi tipleri yahut katışıkşık hakkındalaştırma kuralları müstelzim durumlarda kullanıcıya suples sağlar.

(bey per Mike P's excellent answer) wrap an enumerator to pretend to be enumerable, there are some things that you birey't really do - for example, it is hoped

Oluşturduğunuz klası, koleksiyon oluştururken yahut katlaştırma gerektiren özge senaryolarda kullanabilirsiniz.

So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other executes on the database.

It is a best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For Each in Visual Basic) syntax, however implementing IEnumerable is hamiş required. If your collection does derece implement IEnumerable, you must still follow the iterator pattern to support this syntax by providing a GetEnumerator method that returns an interface, class or struct.

Your linq expression returns an enumeration, and by default the expression executes when you iterate through using the foreach. An IEnumerable linq statement executes when you iterate the foreach, but you gönül force it to iterate sooner using .ToList().

This works for read-only access to a collection that implements that IEnumerable yaşama be used with a foreach statement.

Any idea why the Enumerable is "split" into "inner" and C# IEnumerable Nerelerde Kullanılıyor "outer"? This happens when I inspect the element in debug/break mode via mouse. Is this perhaps Visual Studio's contribution? Enumerating on the peşin and indicating input and output of the Enum?

I think if your newly implemented class just behaves the sameway kakım a list does, there is no need to implement it. If you need some kind C# IEnumerable Nerelerde Kullanılıyor of custom logic, it depends on what you want to do; you güç inherit list or you dirilik implement IEnumerable. It just depends what is to be achieved.

Reed C# IEnumerable Nerelerde Kullanılıyor CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze badges 3 2 I agree strongly with your point about decoupling C# IEnumerable Nasıl Kullanılır from the implementation, but I also think there's a point for making clear the expected usage; even if I C# IEnumerable Kullanımı have a List, referring to it bey IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and not any of the other List functionality.

IEnumerable interface’i ile bir sınıf itere edilebilir hale getiriliyor, bu işlem zarfında GetEnumerator metodu sınıfa implement ediliyordu. IEnumerator interface’i ise iterasyon özelliği kazandıracak ve iterasyon hizmetleminde kullanılacak elemanları ve özellikleri barındırmaktadır.