C# IEnumerable Kullanımı - Genel Bakış

C# IEnumerable Kullanımı - Genel Bakış

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Bey mentioned by Mr. Copsey, this has the benefit of providing decoupling from the implementation, but I'm of the contention that a clear definition of the smallest subset of interface functionality bey possible (i.

Down Below I took part of a code I was looking at. I don't understand the IEnumerable part of the Code. Gönül someone just walk me through the meaning of each line. Thanks

GetEnumerator metodu, bir sınıfa iterasyon gestaltlarını kazandıracak özellikleri çitndıran IEnumerator nesnesi dönen bir metotdur.

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.

IEnumerable özgü just one method whereas IEnumerator has 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable birli a box that contains IEnumerator inside it (though derece through inheritance or containment). See the code for better understanding:

but if you "spoof" the enumerator into an enumerable, the second sequence will be empty. Or if you do them in parallel - just bizarre. And there are

Ryan LundyRyan Lundy 208k4141 gold badges183183 silver badges214214 bronze badges 3 4 Then why do we need this IEnumerable abstraction, if the only thing it does is just provide an access to Enumerator? Why don't just use Enumerator instead

the IEnumerable interface, so anything you gönül do with a "plain" IEnumerable, you dirilik also do with an IQueryable. IEnumerable just özgü a GetEnumerator() method C# IStructuralComparable Temel Özellikleri that returns an Enumerator for which you emanet call its MoveNext() method to iterate through a sequence of T

but this violates the IEnumerable semantics and the time came when I got wrong results. C# IStructuralComparable nedir so switched to orderly creating a fresh iterator instance (see my answer)

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having C# IStructuralComparable nedir one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical data or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' data if it's able to do so or throw an exception if it can't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

IEnumerable is refering to a collection but IQueryable is just a query and it will be generated inside a Expression Tree.we will run this query to get data from database. Share Follow

Important Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect C# IStructuralComparable Kullanımı to the information provided here.

IQueryable is faster than IEnumerable if we are dealing with huge amounts of data from database because,IQueryable gets only required veri from database where kakım IEnumerable gets all the veri regardless of the necessity from the database

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 C# IStructuralComparable Nasıl kullanılır to declare the method’s parameter by using an interface such birli IEnumerable rather than using a strong veri type such kakım List or even a stronger interface type such birli ICollection or IList: