En iyi Tarafı C# IEnumerable Nedir

En iyi Tarafı C# IEnumerable Nedir

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does not, at least hamiş in general terms for those of us who don't work in the secret labs of Microsoft.

Yani artık custom bir enumerator dershaneı yazmamıza icap yok yield keyword'ü ile compiler bunu dal planda bizim yürekin örgüyor.

g. executing SQL on GarbageCollected contexts). I would say that ICollection is every thing you said apart from the "lazy evaluation" and we should be using that, especially if the data saf already been enumerated once!

The following code example demonstrates the best practice for iterating a custom collection by implementing the IEnumerable and IEnumerator interfaces. In this example, members of these interfaces are hamiş explicitly called, but they are implemented to support the use of foreach (For Each in Visual Basic) to iterate through the collection.

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

Quoting that article, 'As per C# IStructuralComparable Nasıl kullanılır the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.

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

To begin examining the process of implementing existing .Kupkuru interfaces, let’s first look at the role of

"These methods that extend IQueryable(Of C# IStructuralComparable Nasıl kullanılır T) do derece perform any querying directly. Instead, their functionality is to build an Expression C# IStructuralComparable Temel Özellikleri object, which is an expression tree that represents the cumulative query. "'

Kısaca IEnumerable bünyesında filtreleme konulemleri C# IStructuralComparable Kullanımı memory bile yapılırken, IQueryable da veritabanından direk filtrelenmiş verileri elde ederiz.

Then with a IQueryable the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, then the x.name = “a” check will be done by .Kemiksiz.

The reason, of course, is that someone gönül call the first method passing in an array object, a List object, a String object, and so on — any object whose type implements IEnumerable.

IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).

IEnumerable interface’i ile bir derslik itere edilebilir hale getiriliyor, bu prosedür ortamında GetEnumerator metodu sınıfa implement ediliyordu. IEnumerator interface’i ise iterasyon özelliği kazandıracak ve iterasyon meslekleminde kullanılacak elemanları ve özellikleri çitndırmaktadır.