Bir İnceleme C# IEnumerable Kullanımı

Bir İnceleme C# IEnumerable Kullanımı

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şayet milyonlarca kayıt üzerinde sorgulama konulemi yapıyorsak kuşkusuz IQueryable IEnumerable için henüz hızlı sorgulama işlemi yapar.

Örneğin oluşturduğumuz bir List içine tığ Add komutu ile ekleme yapabiliyoruz veya Count ile içerisinde kâin elemanların saykaloriı alabiliyoruz ve bunu foreach içerisinde kullanabiliyoruz. Peki List bir dershane olmasına mukabil foreach nasıl buna destur veriyor?

. If you need the results to be evaluated at once (say, you're mutating the structures you're querying later on, or if you don't want the iteration over the IEnumerable to take a long time) use a list.

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Although there are uses of IEnumerable other than "foreach", the uygun indication that one should implement IEnumerable is that the class is one where it would make sense to say "foreach foo in classItem foo.do_something(); .

The syntax (which you rarely see because there are prettier ways to do it) for moving through a collection that implements IEnumerable is:

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The major difference between IQueryable and IEnumerable is that IQueryable executes query with filters whereas IEnumerable executes the query first and then it filters the data based on conditions.

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This takes an IEnumerator factory function, which usually C# IStructuralComparable Kullanımı emanet 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 IEnumerable behavior.

a reset on enumerators, but this is largely a design C# IStructuralComparable nedir mistake and shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).

Joel CoehoornJoel Coehoorn 410k114114 gold badges576576 silver badges808808 bronze badges 3 3 The key of IEnumarable is that the backing collection is not enumerated until specifically expanded, be it a foreach or C# IStructuralComparable nerelerde kullanılıyor accessor via an indexer. Unfortunately IEnumarable seems to be blindly used birli the lowest interface C# IStructuralComparable nerelerde kullanılıyor which now causes problems with asynchronous veri manipulation (e.

In addition to all the answers posted above, here is my two cents. There are C# IStructuralComparable Temel Özellikleri many other types other than List that implements IEnumerable such ICollection, ArrayList etc.