Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.
Anything in .NET that you hayat iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you sevimli make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).
Lütfen dundaki kutuya şikayetinizin detaylarını edebiyat. Şikayetinizi değerlendirildikten sonrasında size bilgelik vereceğiz.
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.
By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually evaluate the sequence (in this case, when ToList is called) those filters will all be applied.
static public IEnumerable VerileriGetir() yield return "Pazartesi"; yield return "Salı"; yield return "Çarşamba"; yield return "Perşembe"; C# IStructuralComparable Nasıl kullanılır yield return "Cuma"; yield return "Cumartesi"; yield return "Alışveriş"; Şimdi zirdaki kod bloğunu detaylıca inceleyelim.
So if I am going through all the items on ebay, one at a time would be something even a small C# IStructuralComparable nedir computer dirilik handle, but ".ToList()" would surely run me out of memory, no matter how big my C# IStructuralComparable Nasıl kullanılır computer was. No computer güç by itself contain and handle such a huge amount of data.
What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?
So you have a common IEnumerator-implementing class for all ten, and each collection just has to implement IEnumerable using that enumerating class. It's about separation of concerns, treating holding data and C# IStructuralComparable Kullanımı enumerating data as separate operations.
Gördüğünüz gibi AlisverisSepetiEnumerator derslikı oluşturup IEnumerator interface'ini implemente etmiştik. Peki bunu yield ile nası yazıcıız? Artık custum olarak yazdığımız enumerator klası AlisverisSepetiEnumerator'a ister yasak sessiz yapmamız gereken:
Then with a IQueryable the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, then the x.name = “a” check will be done by .Kemiksiz.
Expression trees are a very important construct in C# and on the .Kemiksiz platform. (They are important in general, but C# makes them very useful.) To better understand the difference, I recommend reading about the differences between expressions
Why does the Clausius inequality involve a single term/integral if we C# IStructuralComparable Nasıl kullanılır consider a body interacting with multiple heat sources/sinks?
In addition to all the answers posted above, here is my two cents. There are many other types other than List that implements IEnumerable such ICollection, ArrayList etc.