The Ultimate Guide To C# IEnumerable Nedir
The Ultimate Guide To C# IEnumerable Nedir
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, and the database only returns the rows that are relevant. But if we had returned a List from AllSpotted(), then it may run slower because the database could return far more data than is actually needed, and we waste cycles doing the filtering in the client.
What this code is saying is that if userId was specified, then add a filter on the veri so that only items where the userId matches that variable will be included. That same thing is done for email and lastFourdigits.
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It's effectively usage kakım documentation of intent; I find that those explicit documentations of intent tend to provide exactly that decoupling you point out.
Sonunda burada ortaya çıkan sonuç; IEnumerable interfaceinin uygulandığı sınıfa zorla GetEnumerator adlı metot implement ettirilmektedir. IEnumerator ise ait sınıfa iterasyon maslahatleminde kullanılacak elemanları ve özellikleri kazandırmaktan mesuliyetli olacaktır.
Quoting that C# IEnumerable Kullanımı article, 'Kakım per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.
Şimdi bu ifadelerin elan vazıh olması bâtınin bir örnek üzerinden gidelim ve bir önceki alfabemızda custom Enumerator sınıfı ile yazdığımız Alisveris Sepeti iterator örneği yolırlayalım:
IEnumerable gives you the way to implement your own logic of storing and iterating over object collection
Nobody mentioned one crucial difference, ironically answered on a question closed birli a duplicated of this. IEnumerable is read-only and List is not.
Is it legal to initialize an array via a functor which takes the array itself as a parameter by reference? more hot questions
Bu alanda yahut başka bir alanda, benim ve gayrı yardımcı insanların paylaşımlarına lütfen acizliğiniz ve ezikliğinizle yaklaşmayınız. İzin istemek, benim hükmüm altına girmeniz manaına gelmemektedir.
a reset on enumerators, but this is largely a design mistake and shouldn't C# IEnumerable Kullanımı 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 hamiş enumerated until specifically expanded, be it a foreach or accessor via C# IEnumerable Nasıl Kullanılır an indexer. Unfortunately IEnumarable seems to be blindly used kakım the lowest interface which now causes problems with asynchronous veri manipulation (e.
You should C# IEnumerable Nasıl Kullanılır still avoid declaring the parameter type bey List. Using IList allows the caller to pass arrays C# IEnumerable Nedir and any other objects whose type implements IList.