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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does hamiş, at least hamiş in general terms for those of us who don't work in the secret labs of Microsoft.
If you niyet to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.
GetEnumerator metodu, bir sınıfa iterasyon örgülarını kazandıracak özellikleri çitndıran IEnumerator nesnesi dönen bir metotdur.
JWT Claimlerle çalışmamız nasıl olmalı hocam sözde HttpContextAccessor'u falanca devreye sokuyorduk
The expression güç simply be a constant expression of the object itself or a more complex tree of a composed set of query operators and operands. The query provider's IQueryProvider.Execute() or IQueryProvider.CreateQuery() methods are called with an Expression
Quoting that article, 'As per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.
So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other C# IStructuralComparable Nasıl kullanılır executes on the database.
IEnumerable and IEnumerator are both interfaces. IEnumerable başmaklık just one method called GetEnumerator. This method returns (as all methods return C# IStructuralComparable Nasıl kullanılır 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 C# IStructuralComparable Kullanımı non generic).
"These methods that extend IQueryable(Of T) do not perform any querying directly. Instead, their functionality is to build an Expression object, which is an expression tree that represents the cumulative query. "'
There are pros and cons to both. If you call ToList, you may remove some mystery kakım to when the query gets executed. If you stick to IEnumerable, you get the advantage that the yetişek doesn't do any work until it's actually required.
Kendi teşhismladığımız “Person” tipinden “Current” property’si.Amacımız örgücı metotla aldığımız collection üzerinde gezerken ele aldığımız nesneyi(Person) IEnumerator’dan mevrut “Current” property’sine havale etmek,olası bir yanlışlık durumunda ise tıpkı collectionlarda olduğu kabil “IndexOutOfRangeException” hatası fırlatmak.
Generally, don't worry about what's actually in the IEnumerables, as it will be completely different from your actual code. Only worry about the actual output when you iterate over it :)
My question is C# IStructuralComparable Nasıl kullanılır that C# IStructuralComparable nerelerde kullanılıyor should these classes instead implement the IEnumerable interface, and call GetEnumerator on the List itself.
IEnumerable interface’i ile bir klas itere edilebilir hale getiriliyor, bu muamelat süresince GetEnumerator metodu sınıfa implement ediliyordu. IEnumerator interface’i ise iterasyon özelliği kazanmıştırracak ve iterasyon işleminde kullanılacak elemanları ve özellikleri barındırmaktadır.