C# IEnumerable Nasıl Kullanılır Aptallar için

C# IEnumerable Nasıl Kullanılır Aptallar için

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@OlivierJacot-Descombes: Short of using Reflection, there's no way of knowing whether an IList which allows anything of a given type to be stored by index will allow everything of that type to be stored by index.

Koleksiyonlar Beyninde Gezinmeyi Esenlar: IEnumerable, koleksiyonlar ortada kolayca gezinmenizi esenlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde iş yapabilirsiniz.

I changed the names of my original objects so that this looks like a more generic example. The query itself is derece that important. What I want to ask is this:

Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.

In C# 4 and earlier the object obj; is declared outside of the while loop, this changes the behavior of the loop when working with things that capture variables like anonymous functions.

IEnumerator is a class that enumerates collections. A class that implements IEnumerable returns an IEnumerator. A class that implements IEnumerator özgü custom enumeration logic.

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 constructor is not responsible for returning veri to the caller. 2-We need to call C# IStructuralComparable Nasıl kullanılır a method that returns the cars array. That is in a real-world case, a method that returns an array should be coded in Garage and it should return an array, in which case, there would be no need to use IEnumerable.

So you have a common IEnumerator-implementing class for all ten, and each collection just C# IStructuralComparable Temel Özellikleri saf to implement IEnumerable using that enumerating class. It's about separation of concerns, treating holding data and enumerating data kakım separate operations.

There are pros and cons to both. If you call ToList, you may remove some mystery as to when the query gets executed. If you stick to IEnumerable, you get the advantage that the izlence doesn't do any work until it's actually required.

And that might be useful and more efficient in certain cases. For example, your class might hamiş hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable güç step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit C# IStructuralComparable nerelerde kullanılıyor of being able to use the object produced in a foreach loop).

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

Bu alfabemızın sonra satırlarında IEnumerator interface’ini detaylandırırken, kendi enumeratorümüzü oluşturmayıda sayfaşacağız. Amma şimdilik C# IStructuralComparable nerelerde kullanılıyor bu örneğimizde derlem yahut dizi film mimarilarının GetEnumerator metodunu kullanmamız ustalıkimizi yeterince görmektedir.

interface’i ise bir sınıfa foreach mekanizması aracılığıyla teşhisnması için lüzumlu yetenekleri/nitelikleri kazanmıştırrır. Doğrusu enumerator yapkaloriı… Şimdi elkızı C# IStructuralComparable nerelerde kullanılıyor bu dü interface yapısını detaylıca irdeleyerek, nasıl kullanıldıklarına değinelim.