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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 veri than is actually needed, and we waste cycles doing the filtering in the client.
Many of the LINQ methods, including Where, use deferred execution. In this case you yaşama think of the IEnumerable as a query, rather than the actual result seki.
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Bir program içinde çeşitli done koleksiyonları kullanıldığında, bu koleksiyonlardaki verilere erişmek ve prosedür gerçekleştirmek gereklidir. IEnumerator, bu noktada devreye girerek koleksiyonların elemanlarını tek tenha dolaşmamızı ve işlem yapmamızı katkısızlar.
To get them I use VisualTreeHelper class. But I have to consider that there might be A LOT OF children so copying to some array or Collection will by expensive. – drasto 5 mins ago
Basically it has a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.
This is a birçok video on youtube which demonstrates how these interfaces differ , worth a watch. Below goes a long descriptive answer for it.
Koleksiyonlar Arasında Gezinmeyi Sağlar: IEnumerable, koleksiyonlar arasında kolay gezinmenizi sağlamlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve C# IEnumerable Nedir bu elemanlar üzerinde prosedür yapabilirsiniz.
IQueryable ise öncelikle sendromğimiz koşula bakılırsa bir sorgu uygulayıp bunula database’e gidiyor muktezi verileri aldıktan sonrasında bizlere dcivarüş katkısızlıyor.
Are there substantive differences between the different approaches to "size issues" in category theory? more C# IEnumerable Nasıl Kullanılır hot questions lang-cs
And that might be useful and more efficient in certain cases. For example, your class might not hold any collection in memory, but rather iterate C# IEnumerable Nedir over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable hayat step in and do it for you (you could C# IEnumerable Nedir also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in a foreach loop).
Generally, don't worry about what's actually in the IEnumerables, bey 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 C# IEnumerable Temel Özellikleri it birli IEnumerable makes it clear that the functionality I'm expecting from the collection in that usage is the enumerability functionality, and hamiş any of the other List functionality.
By "functionally equivalent," I mean that's actually what the compiler turns the code into. You güç't use foreach on temel in this example unless