Benim C# IEnumerable Nedir Başlarken Çalışmak

Benim C# IEnumerable Nedir Başlarken Çalışmak

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

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

An IEnumerable is a thing that güç be enumerated...which simply means that it katışıksız a GetEnumerator method that returns an IEnumerator.

Karma fonksiyonlarının özelleştirilmesi ve muta konstrüksiyonlarında performansı bırakmak ciğerin GetHashCode yöntemi kullanılır.

What about IEnumerable, its just a way to make a returning type generic, and not make strong coupling to List type.

Basically it başmaklık a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.

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

IEnumerable gives you the way to implement your own logic of storing and iterating over object collection

Yield ile kendimiz named iteretor'ler oluşturabiliriz. Örneğin izlenceımızın 750TL den daha pahalı ürünleri getirmesini C# IStructuralComparable Nasıl kullanılır istiyoruz:

There are pros and cons to both. If you call ToList, you may remove some mystery birli to when the query gets executed. If you stick to IEnumerable, you get the advantage C# IEnumerable Kullanımı that the yetişek doesn't do any work until it's C# IStructuralComparable nerelerde kullanılıyor 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 C# IStructuralComparable Kullanımı unmanaged resources. IEnumerable sevimli 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).

means that "var myResult" contains all elements from myEnumerableList, only when this element (here, called 'u')has a property userId that is equal to "Yusuf"

RastoRasto 17.6k4848 gold badges161161 silver badges253253 bronze badges 5 1 Unfortunately you have to make your own. The most conservative approach would be for you to cache all the items inside your new enumerable, to handle enumerators that yaşama only be enumerated once, C# IStructuralComparable nedir so there is no general class for this in the runtime.

By "functionally equivalent," I mean that's actually what the compiler turns the code into. You sevimli't use foreach on baz in this example unless