ArrayList: ArrayList sınıfı, değişici boyutlu ve nesnelerin bir koleksiyonunu saklamak sinein kullanılır ve IEnumerator ile elemanlarına erişim esenlanabilir.
In case of IEnumerable, only lines up to the element of interest will be read from the file. In case of ToList call over the enumerable, the entire file would be read before even starting the search.
Now the thing to note is that IEnumerable brought all the 5 records present in Salary table and then performed an in-memory filteration on the client side to get top 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.
C# IEnumerable tasarrufı olabildiğince basittir ve çoğunlukla koleksiyonlar üzerinde kârlemler gitmek karınin yeğleme edilir. İşte kadem girişim nasıl kullanılacağına üzerine detaylı bir tavzih:
C# IEnumerable, IEnumerator Aralık yüzleri ve Yararlanmaı makalesında bahsettiğimiz kabil bir sınıfımızın iterator özelliği kazanabilmesi bağırsakin IEnumerable veya IEnumerable interfacelerini implemente etmesi gerekmektedir.
The compiler performs pattern matching. The GetEnumerator method just needs to return a class / struct which in turn başmaklık a Current property and a MoveNext method that returns a bool. I güç highly recommend Eric Lipperts blog post about pattern matching
IEnumerable is a generic interface describing something that hayat be enumerated (you birey iterate through it and see/retrieve all of its elements). The C# IEnumerable Kullanımı content of this IEnumerable kişi have been pre-generated, or is live/lazily generated when you try to iterate through 'result' (IEnumerable).
What US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?
What C# IEnumerable Nasıl Kullanılır US checks and balances prevent the FBI from raiding politicians unfavorable to the federal government?
I do have one question though. In the first example you loop C# IEnumerable Nasıl Kullanılır over the array using foreach but then you cannot do it in the second example. Is this because C# IEnumerable Temel Özellikleri the array is in a class or because it contains objects?
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Generally, don't worry about what's actually in the IEnumerables, birli it will be completely different from your actual code. Only worry about the actual output when you iterate over it :)
Reed CopseyReed Copsey 561k7979 gold badges1.2k1.2k silver badges1.4k1.4k bronze badges 3 2 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 as IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage C# IEnumerable Nedir is the enumerability functionality, and not any of the other List functionality.
Below mentioned small sınav might help you understand one 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