Büyülenme Hakkında C# IEnumerable Kullanımı

Büyülenme Hakkında C# IEnumerable Kullanımı

Blog Article

Data dürüstışı ve LINQ sorguları: IEnumerable, Language Integrated Query (LINQ) sorgularında münteşir olarak kullanılır. LINQ, muta koleksiyonları üzerinde sorgulama ve filtreleme gibi işlemlemleri kolaylaştırır ve başarımı fazlalıkrır.

Bu dü arayüzün tasarruf senaryoları farklıdır ve birbirlerinin namına kullanılmamalıdır. Bu makalede, IEnumerable ve IQueryable arasındaki farkları inceleyeceğiz.

I changed the names of my original objects so that this looks like a more generic example. The query itself is not that important. What I want to ask is this:

Katışık fonksiyonlarının özelleştirilmesi ve bilgi strüktürlarında başarımı tezyit etmek bağırsakin GetHashCode yöntemi kullanılır.

This will create a new list element for each element in memory, enumerating the IEnumerable and is thus less performant if you only enumerate once - but safer and sometimes the List methods are handy (for instance in random access).

So if you working with only in-memory veri collection IEnumerable is a good choice but if you want to query data collection which is connected with database `IQueryable is a better choice as it reduces network traffic and uses the power of SQL language.

// but this throws an exception, because the pointer or link to the // database namely the DbContext called MyEntities no longer exists.

It is a C# IStructuralComparable Nasıl kullanılır best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For C# IStructuralComparable Temel Özellikleri Each in Visual Basic) syntax, however implementing IEnumerable is derece 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.

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 at a time. So if you want to loop over the lines in a very large file, for example, you birey write an iterator block to handle the file input.

When you write a query using IEnumerable you are using the advantages of deferred execution and your query running when it accessed.

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

But if your class cannot act like a collection then provide a public IEnumerable property for its elements:

My question is that should these classes instead implement the IEnumerable interface, and call C# IStructuralComparable nedir GetEnumerator on the List itself.

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