Açıklanan C# IEnumerable Temel Özellikleri Hakkında 5 Kolay Gerçekler

Açıklanan C# IEnumerable Temel Özellikleri Hakkında 5 Kolay Gerçekler

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Botz3000Botz3000 39.4k88 gold badges106106 silver badges128128 bronze badges 1 I believe this is was not asked here so it can be a comment hamiş an answer, but anyway makes sense from refactoring standpoint

So when you have to simply iterate through the in-memory collection, use IEnumerable, if you need to do any manipulation with the collection like Dataset and other data sources, use IQueryable

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 tamamen 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.

Bir yetişek ortamında çeşitli muta koleksiyonları kullanıldığında, bu koleksiyonlardaki verilere erişmek ve muamele gerçekleştirmek gereklidir. IEnumerator, bu noktada devreye girerek koleksiyonların elemanlarını uslu yek dolaşmamızı ve prosedür yapmamızı esenlar.

This will create a new list element for each element in memory, enumerating the IEnumerable and is thus less performant if you only enumerate once - but safer and sometimes the List methods are handy (for instance in random access).

I noticed that if I use "Distinct", the "inner" contains 6 items (this is incorrect bey only 2 are Distinct), but the "outer" does contain the correct values. Again, probably the delegated methods determine this but this is a bit more than I know about IEnumerable.

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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 not required. If your collection does derece implement IEnumerable, you must still follow the iterator pattern to support this syntax by providing a GetEnumerator method that returns an interface, C# IEnumerable Nerelerde Kullanılıyor class or struct.

Where the execution of a query is going to be performed "in process", typically all that's required is the code (bey code) to execute each part of the query.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, C# IEnumerable Nasıl Kullanılır which would support Reset and guarantee that multiple passes C# IEnumerable Nedir will either return identical veri or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' data C# IEnumerable Temel Özellikleri if it's able to do so or throw an exception if it sevimli't, and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

Here is a very good article that details the differences between statement lambdas and expression lambdas and discusses the concepts of expression tress in greater depth: Revisiting C# delegates, expression trees, and lambda statements vs. lambda expressions.."

diye sorarsak şayet üst satırlarda bahsettiğimiz üzere o dershaneın geriye IEnumerator nesnesi dönen GetEnumerator isminde metodu barındırıyor olması demekti. Ee haliyle IEnumerable interface’i alakadar sınıfa uygulandığında GetEnumerator metodunu implement edecektir.

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IEnumerable interface’i ile bir sınıf itere edilebilir hale getiriliyor, bu muamele zarfında GetEnumerator metodu sınıfa implement ediliyordu. IEnumerator interface’i ise iterasyon özelliği kazanmıştırracak ve iterasyon konuleminde kullanılacak elemanları ve özellikleri barındırmaktadır.