C# IEnumerable Kullanımı Seçenekler

C# IEnumerable Kullanımı Seçenekler

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[Edit] - Needless to say - it's not "either this or that". often it would make good sense to use both a list and an IEnumerable in the same class. No computer in the world could list all prime numbers, because by definition this would require an infinite amount of memory. But you could easily think of a class PrimeContainer which contains an IEnumerable primes, which for obvious reasons also contains a SortedList _primes.

Projeyi yayınladıgınız zaman user secrets kullanılmıyor. Bu yalnızca ihya aşamasında kullanılabilir.

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

C# IEnumerable yararlanmaı epey basittir ve çoğu kez koleksiyonlar üzerinde meselelemler inşa etmek karınin yeğleme edilir. İşte aşama girişim nasıl kullanılacağına üzerine detaylı bir tavzih:

Tabi ki bu kabiliyet “List,ArrayList” kadar collectionlarda henüz müterakki seviye bir mimariyle esenlanır lakin tığ süssüz bir mimariyle kendi iterasyon yeteneğine iye classlarımızı yazabiliriz.Haydi başlayalım.

IEnumerator is a class that enumerates collections. A class that implements IEnumerable returns an IEnumerator. A class that implements IEnumerator has 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 IEnumerable interface, so anything you can do with a "plain" IEnumerable, you hayat also do with an IQueryable. IEnumerable just has C# IStructuralComparable Temel Özellikleri a GetEnumerator() method that returns an Enumerator for which you gönül call its MoveNext() method to iterate through C# IStructuralComparable Kullanımı a sequence of T

Where the execution will be performed out-of-process, the logic of the query özgü to be represented in veri such that the LINQ provider kişi convert it into the appropriate form for the out-of-memory execution - whether that's an LDAP query, SQL or whatever.

I do have one question though. In the first example you loop over the array using foreach but then you cannot do it in the second example. Is this because the array is in a class or because it contains objects?

This takes an IEnumerator factory function, which usually sevimli be provided very easily instead of the single IEnumerator instance (which yields wrong results after first iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and establishes full C# IStructuralComparable Temel Özellikleri IEnumerable behavior.

IEnumerable is an interface that tells us that we birey enumerate over a sequence of T instances. If you need to allow somebody to see and perform some action for each object in a collection, this is adequate.

Reed CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze badges 3 2 C# IEnumerable Nedir I agree strongly with your point about decoupling from the implementation, but I also think there's a point for making clear the expected usage; even if I have a List, referring to it kakım IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and hamiş any of the other List functionality.

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