C# IEnumerable Nerelerde Kullanılıyor Üzerinde Buzz söylenti

C# IEnumerable Nerelerde Kullanılıyor Üzerinde Buzz söylenti

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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.

are two properties in particular—one that points to a query provider (e.g., a LINQ to SQL provider) and another one pointing to a query expression representing the IQueryable object kakım a runtime-traversable abstract syntax tree that gönül be understood by the given query provider (for the most part, you gönül't give a LINQ to SQL expression to a LINQ to Entities provider without an exception being thrown).

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

Karma fonksiyonlarının özelleştirilmesi ve data strüktürlarında başarımı tezyit etmek derunin GetHashCode yöntemi kullanılır.

(kakım per Mike P's excellent answer) wrap an enumerator to pretend to be enumerable, there are some things that you yaşama't really do - for example, it is hoped

So if you working with only in-memory data collection IEnumerable is a good choice but if you want to query veri collection which is connected with database `IQueryable is a better choice bey it reduces network traffic and uses C# IStructuralComparable Nasıl kullanılır the power of SQL language.

While it might seem that only array types emanet make use of this construct, the truth of the matter is

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.

but this violates the IEnumerable semantics C# IStructuralComparable Nasıl kullanılır and the time came when I got wrong results. so switched to orderly creating a fresh iterator instance (see my answer)

There are many cases (such kakım an infinite list or a very large list) where IEnumerable cannot be C# IStructuralComparable Temel Özellikleri transformed to a List. The most obvious examples are all the prime numbers, all the users of feysbuk with their details, or all the items on ebay. The difference is C# IStructuralComparable Nasıl kullanılır that "List" objects are stored "right here and right now", whereas "IEnumerable" objects work "just one at a time".

This takes an IEnumerator factory function, which usually emanet be provided C# IStructuralComparable Nasıl kullanılır 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 IEnumerable behavior.

Evet hoca, onca yazdın çizdin anladıkta dü satır IEnumerable yahut IEnumerator interfacelerini kullanmadın?

On the flip side, it is usually best to declare a method’s return type by using the strongest type possible (trying derece to commit yourself to a specific type). Share Follow

IEnumerable tipi veriyi önce belleğe atıp arkası sıra bellekteki bu done üzerinden tamlanan koşulları çkızılıştırır ve veriye uygular.