So is it faster to use List over IEnumerable? Only if you want to prevent a query from being executed more than once. But is it better overall? Well in the above, Leopards and Hyenas get converted into single SQL queries each
So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other veri sources, use IQueryable
g. executing SQL on GarbageCollected contexts). I would say that ICollection is every thing you said apart from the "lazy evaluation" and we should be using that, especially if the data özgü already been enumerated once!
Katışık fonksiyonlarının özelleştirilmesi ve done yapılarında performansı çoğaltmak ciğerin GetHashCode yöntemi kullanılır.
IEnumerable has just one method whereas IEnumerator saf 2 methods (MoveNext and Reset) and a property Current. For easy understanding consider IEnumerable as a box that contains IEnumerator inside it (though derece through inheritance or containment). See the code for better understanding:
What I do is make a class that implements both IEnumerator and IEnumerable. Make GetEnumerator() return itself and you dirilik iterate it like olağan.
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 C# IEnumerable Nedir delegates determine which goes in and what goes out of it?
Şimdi makalemizin bu noktasına mevrut okuyucularımın kafalarında muhakemesini yapmış oldukları sermayeşmalar unvanırım üç aşağı C# IEnumerable Nasıl Kullanılır beş yukarı zirda hesap ettiğime model niteliktedir.
Where the execution will be performed out-of-process, the logic of the query özgü to be represented C# IEnumerable Nedir in data such that the LINQ provider hayat C# IEnumerable Temel Özellikleri convert it into the appropriate form for the out-of-memory execution - whether that's an LDAP query, SQL or whatever.
By using IEnumerable in your API, you provide yourself the flexibility to change the internal implementation at any time without changing any other code
It is cleaner, your users don't get a list where they shouldn't (they could cast it to a Listafter all) and you don't need to create a Listobject.
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Bu interface, uygulandığı sınıfa GetEnumerator adlı bir metot kazanmıştırrır ve bu metot geriye IEnumerator interface’ini implement eden bir sınıf döndürür.
You should still avoid declaring the parameter type birli List. Using IList allows the caller to pass arrays and any other objects whose C# IEnumerable Kullanımı type implements IList.