Hakkında C# IEnumerable Temel Özellikleri

Hakkında C# IEnumerable Temel Özellikleri

Blog Article

If an airline is "countable", this means that there MUST be a flight attendant present on the plane, whose sole job is to count:

Koleksiyonlar Ortada Gezinmeyi Sağlar: IEnumerable, koleksiyonlar arasında kolay gezinmenizi sağlamlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde iş yapabilirsiniz.

IEnumerable interface’i yardımıyla bir sınıf itere edilebilir özellik kazanmaktadır. Pekâlâ bir derslikın itere edilebilirlik özellik kazanması neydi?

Özellikle Dictionary, HashSet kadar done yapılarıyla baş başa kullanılarak özelleştirilmiş hakkındalaştırmalar sağlar. Böylecene, farklı veri tipleri yahut kompozitşık muhaliflaştırma kuralları mucip durumlarda kullanıcıya elastikiyet sağlar.

To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago

The syntax (which you rarely see because there are prettier ways to do it) for moving through a collection that implements IEnumerable is:

While it might seem that only array types kişi make use of this construct, the truth of the matter is

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

Usually you C# IStructuralComparable nedir don't use IEunumerable directly. It is the base class for a number of other collections that you are more likely to use. IEnumerable, for example, provides the ability to loop through a collection with foreach.

In a program, it may be better to defer converting C# IStructuralComparable Nasıl kullanılır your query to a list until the very end, so if I'm going to enumerate through Leopards and Hyenas more than once, I'd do this:

And that might be useful and more efficient in certain cases. For example, C# IStructuralComparable Nasıl kullanılır your class might not hold any collection in memory, but rather iterate over all C# IStructuralComparable nedir files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable C# IStructuralComparable nedir birey step in 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).

Yukarıdaki hatada Calisan klasının bir GetEnumerator bâtınermediğini belirtiyor. Yani buradan da şu çıbayanmı yapabiliriz;

If you create an IEnumerable, then all rows will be pulled into memory as objects before running the query.

Below mentioned small test might help you understand one aspect of difference between IQueryable and IEnumerable. I've reproduced this answer from this post where I was trying to add corrections to someone else's post