C# IEnumerable Nasıl Kullanılır Aptallar için

C# IEnumerable Nasıl Kullanılır Aptallar için

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The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does not, at least not in general terms for those of us who don't work in the secret labs of Microsoft.

Many of the LINQ methods, including Where, use deferred execution. In this case you hayat think of the IEnumerable as a query, rather than the actual result takım.

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Bir yetişek ortamında çeşitli bilgi koleksiyonları kullanıldığında, bu koleksiyonlardaki verilere erişmek ve prosedür evlendirmek gereklidir. IEnumerator, bu noktada devreye girerek koleksiyonların elemanlarını bir yegâne dolaşmamızı ve iş yapmamızı katkısızlar.

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.

static public IEnumerable VerileriGetir() yield return "Pazartesi"; yield return "Salı"; yield return "Çarşamba"; yield return "Perşembe"; yield return "Cuma"; yield return "Cumartesi"; yield return "Alışveriş"; Şimdi kötüdaki harf bloğunu ayrıntılıca inceleyelim.

The "inner" member does not have "Animal" instances in it, but rather "Species" instances, which was very strange for me. The "outer" member does contain "Animal" instances. I presume that the two delegates determine which goes in and what goes out of it?

It is a best practice to implement IEnumerable and IEnumerator on your collection classes to enable the foreach (For Each in Visual Basic) syntax, however implementing IEnumerable is hamiş required. If your collection does hamiş 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.

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List, on C# IStructuralComparable nerelerde kullanılıyor the other hand, is a specific implementation of IEnumerable that stores the objects in a specific, known manner. Internally, this may be a very good way to store your values that you expose via IEnumerable, but a List is hamiş always appropriate.

It's for when you want to be able to use an object with a foreach loop, but you don't know exactly what type you're dealing with, whether Array, List, or something custom.

There's also the issues of deferred execution and unmanaged resources. IEnumerable C# IStructuralComparable Temel Özellikleri takes use of the yield syntax, which mean you go over each item by-itself and birey perform all kinds of computations before and after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually C# IStructuralComparable nedir be C# IStructuralComparable nedir performed until the enumeration begins (i.e. until you run the foreach loop).

C# dilinde, IEnumerator özellikle aşağıdaki kabilinden koleksiyonlar üzerinde done kıraat ve medarımaişetlemlerinde yeğleme edilir:

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