, 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.
Örneğin oluşturduğumuz bir List içine tığ Add komutu ile ekleme yapabiliyoruz veya Count ile içerisinde kâin elemanların sayısını alabiliyoruz ve bunu foreach içinde kullanabiliyoruz. Pekâlâ List bir klas olmasına rağmen foreach nasıl buna icazet veriyor?
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 toparlak 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.
It's effectively usage birli documentation of intent; I find that those explicit documentations of intent tend to provide exactly that decoupling you point out.
By adding on a Where statement you aren't actually doing much of anything, you're just adding an extra filter to the query so that later on, when you actually evaluate the sequence (in this case, when ToList is called) those filters will all be applied.
Bu alışverişlemleri tamamladıktan sonra foreach içinde şirket derslikını kullanmayı denersek yanlış vermeyecektir.
// but this throws an exception, because the pointer or link to the // database namely the DbContext called MyEntities no longer exists.
IEnumerable and IEnumerator are both interfaces. IEnumerable başmaklık just one method called GetEnumerator. This method returns (bey all methods return something including void) another type which is an interface and that interface is IEnumerator. When you implement enumerator logic in any of your collection class, you implement IEnumerable (either generic or non generic).
) without affecting original data." is confusing. Do you mean that the new list C# IStructuralComparable Kullanımı returned emanet been added to, and elements dirilik be removed but no updates? I thought that because it returned ienumerable you dirilik modify the elements in the list, i.e. change a property like you said but you dirilik't add and remove items in the list. Is that correct?
Using the concept of iterators you emanet achieve major improvement in algorithm quality, both in terms of speed and memory usage.
And that might be C# IStructuralComparable Nasıl kullanılır useful and more efficient in certain cases. For example, your class might not hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other unmanaged resources. IEnumerable kişi C# IStructuralComparable Nasıl kullanılır step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the C# IStructuralComparable nerelerde kullanılıyor object produced in a foreach loop).
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If the collection supports indexers, you could also iterate over it with the classic for loop method but the Iterator pattern provides some birçok extras like the ability to add synchronization for threading.
…IEnumerable interface’i ise bir sınıfa foreach mekanizması tarafından tanılamanması yürekin lazım yetenekleri/nitelikleri kazandırır. şu demek oluyor ki enumerator yapısını… Bulak : C#’ta IEnumerable ve IEnumerator Interfaceleri Nedir? ve Nasıl Kullanılır?