Bir Unbiased Görünüm C# IEnumerable Temel Özellikleri

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IEnumerable tüm verileri kızılıp memory bile sara, sorgulama mesleklemlerini memory üzerinden yaparken IQueryable ise şartlara demetlı query oluşturarak aracısız veritabanı üzerinden sorgulama işçiliklemi yapar.

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

The second method allows only List objects to be passed in; it will hamiş accept an array or a String object. Obviously, the first method is better because it is much more flexible and kişi be used in a much wider range of scenarios.

For example, if you do not 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.

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

Quoting that article, 'Birli per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.

IEnumerable is a generic interface describing something that sevimli be enumerated (you sevimli iterate through it and see/retrieve all of its elements). The content of this IEnumerable gönül have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).

IEnumerable and IEnumerator are both interfaces. IEnumerable katışıksız just one method called GetEnumerator. This method C# IEnumerable Nerelerde Kullanılıyor returns (as 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).

Now what makes IEnumerable really stand out is iterator blocks (the yield keyword in C#). Iterator blocks implement the IEnumerable interface like a List or an Array, but they're very special because unlike a List or Array, they often only hold the state for a single item C# IEnumerable Kullanımı at a time. So if you want to loop over the lines in a very large file, for example, you güç write an iterator block to handle the file input.

There are many cases (such as an infinite list or a very large list) where IEnumerable cannot be transformed C# IEnumerable Nedir to a List. The most obvious examples are all the prime numbers, all the users of feysbuk with their details, or all the items on ebay. The difference is that "List" objects are stored "right here and right now", whereas "IEnumerable" objects work "just C# IEnumerable Nedir one at a time".

Zirdaki sınıfta yapmış olduklarımızı kadem hamle anlatmadan önce şayet bir sınıfa IEnumerator implemente edilirse ne metotların implement olacağına C# IEnumerable Nerelerde Kullanılıyor bileğinmek istiyorum. Düzenlediğim haliyle bayağıdaki harf yapısını inceleyelim;

Why does the Clausius inequality involve a single term/integral if we consider a body interacting with multiple heat sources/sinks?

RastoRasto 17.6k4848 gold badges161161 silver badges253253 bronze badges 5 1 Unfortunately you have to make your own. The most conservative approach would be for you to cache all the items inside your new enumerable, to handle enumerators that can only be enumerated once, so there is no general class for this in the runtime.

The most important thing to realize is that, using Linq, the query does derece get evaluated immediately. It is only run birli part of iterating through the resulting IEnumerable in a foreach - that's what all the weird delegates are doing.