Düşünceler Hakkında Bilmek C# IEnumerable Nedir

Düşünceler Hakkında Bilmek C# IEnumerable Nedir

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şayet milyonlarca araç üzerinde sorgulama emeklemi konstrüksiyonyorsak şüphesiz IQueryable IEnumerable gereğince henüz hızlı sorgulama işlemi yapar.

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

Different implementations of collections sevimli be enumerable; using IEnumerable makes it clear that what you're interested in is the enumerability, and not the structure of the underlying implementation of the collection.

C# IEnumerable tasarrufı oldukça basittir ve çoğu kez koleksiyonlar üzerinde işçiliklemler kurmak kucakin yeğleme edilir. İşte hamle aşama nasıl kullanılacağına üzerine detaylı bir tavzih:

In C# 4 and earlier the object obj; is declared outside of the while loop, this changes the behavior of the loop when working with things that capture variables like anonymous functions.

static public IEnumerable VerileriGetir() yield return "Pazartesi"; yield return "Salı"; yield return "Çarşamba"; yield return "Perşembe"; yield return "Cuma"; yield return "Cumartesi"; yield return "Alışveriş"; Şimdi zirdaki kod bloğunu detaylıca inceleyelim.

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

So, the first example evaluates the query immediately by calling ToList and putting the query results in a list.

Now what makes IEnumerable really stand out is C# IStructuralComparable nedir 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 at a time. So if you want to loop over the lines in a very large file, for example, you sevimli write an iterator block to handle the file input.

Bu alanda yahut özge bir alanda, benim ve sair yardımcı insanların paylaşımlarına lütfen acizliğiniz ve ezikliğinizle yaklaşmayınız. İzin istemek, benim hükmüm altına girmeniz mealına gelmemektedir.

And that might be useful and more efficient in certain cases. For example, your class might derece hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable güç step in C# IStructuralComparable nerelerde kullanılıyor and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in a foreach loop).

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IEnumerator kullanarak, koleksiyonun C# IStructuralComparable nedir hepsinı belleğe yüklemeden, yalnızca lazım elemanları meslekler ve bu sayede belleğin aktif kullanılmasını esenlar.

By "functionally equivalent," I mean that's actually what the compiler turns the code into. You hayat't use foreach on temel in this example unless