C# IEnumerable Kullanımı - Genel Bakış

C# IEnumerable Kullanımı - Genel Bakış

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Özellikle Dictionary, HashSet gibi bilgi strüktürlarıyla müşterek kullanılarak özelleştirilmiş zıtlaştırmalar katkısızlar. Sonunda, farklı done tipleri veya katışıkşık karşıtlaştırma kuralları mucip durumlarda kullanıcıya esneklik sağlamlar. C# IEqualityComparer Temel Özellikleri ve Yararlanmaı

Koleksiyonlar Beyninde Gezinmeyi Esenlar: IEnumerable, koleksiyonlar arasında kolay gezinmenizi esenlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde muamele yapabilirsiniz.

. If you need the results to be evaluated at once (say, you're mutating the structures you're querying later on, or if you don't want the iteration over the IEnumerable to take a long time) use a list.

For example, if you do hamiş need to access items by index, but constantly insert items at the beginning of your collection and then remove items from the end, a Queue would be far more appropriate to use.

To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago

Basically it katışıksız a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.

Whenever I'm "stacking" LINQ expressions, I use IEnumerable, because by only specifying the behavior I give LINQ a chance to defer evaluation and possibly optimize the yetişek. Remember how LINQ doesn't generate the SQL to query the database until you enumerate C# IEnumerable Nedir it? Consider this:

the IEnumerable interface, so anything you hayat do with a "plain" IEnumerable, you birey also do with an IQueryable. IEnumerable just katışıksız a GetEnumerator() method that returns an Enumerator for which you kişi call its MoveNext() method to iterate through a sequence of T

Where the execution of a query is going to be performed "in process", typically all that's required is the code (kakım code) to execute each part of the query.

I do have one C# IEnumerable Nerelerde Kullanılıyor question though. In the first example you loop over the array using foreach but then you cannot do it in the second example. Is this because the array is in a class or because it contains objects?

Bu alanda veya C# IEnumerable Nedir değişik bir alanda, benim ve gayrı yardımcı insanoğluın paylaşımlarına C# IEnumerable Temel Özellikleri lütfen acizliğiniz ve ezikliğinizle yaklaşmayınız. İzin istemek, benim hükmüm altına girmeniz fehvaına gelmemektedir.

a reset on enumerators, but this is largely C# IEnumerable Nasıl Kullanılır a design mistake and shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).

On the flip side, it is usually best to declare a method’s return type by using the strongest type possible (trying hamiş to commit yourself to a specific type). Share Follow

When declaring a method’s parameter types, you should specify the weakest type possible, preferring interfaces over base classes. For example, if you are writing a method that manipulates a collection of items, it would be best to declare the method’s parameter by using an interface such bey IEnumerable rather than using a strong data type such as List or even a stronger interface type such kakım ICollection or IList: