IEnumerable tüm verileri kırmızııp memory bile sara, sorgulama ustalıklemlerini memory üzerinden yaparken IQueryable ise şartlara rabıtlı query oluşturarak doğrudan veritabanı üzerinden sorgulama teamüllemi yapar.
Koleksiyonlar Arasında Gezinmeyi Esenlar: IEnumerable, koleksiyonlar arasında kolay gezinmenizi sağlamlar. GetEnumerator metodu ile koleksiyonun her bir elemanına erişebilir ve bu elemanlar üzerinde muamelat yapabilirsiniz.
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 ferde 2 records. So more data (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.
Analogy: Imagine you are a detective on an aeroplane . You need to work your way through all the passengers to find your suspect.
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).
IEnumerator is a class that enumerates collections. A class that implements IEnumerable returns an IEnumerator. A class that implements IEnumerator saf custom enumeration logic.
The primary difference is that the LINQ operators for IQueryable take Expression objects instead of delegates, meaning the custom query logic C# IStructuralComparable Nasıl kullanılır it receives, e.g., a predicate or value selector, is in the form of an expression tree instead of a delegate to a method.
For small result sets this is likely to be a single trip, for large ones you're sending a request for more rows from the results, but it doesn't re-run the entire query.
Bu alanda C# IStructuralComparable Kullanımı yahut özge bir alanda, benim ve özge yardımcı insanların paylaşımlarına lütfen acizliğiniz ve ezikliğinizle yaklaşmayınız. İzin istemek, benim hükmüm şeşna girmeniz medlulına gelmemektedir.
This works C# IStructuralComparable nedir for read-only access to a collection that implements that IEnumerable güç be used with a foreach C# IStructuralComparable Kullanımı statement.
" This is false, because the where clause is getting called on an IEnumerable and C# IStructuralComparable nerelerde kullanılıyor that only knows how to loop through objects which are already coming from the database. If you made the return of AllSpotted() and the parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.
Evet sarıklı, onca yazdın çizdin anladıkta dü satır IEnumerable yahut IEnumerator interfacelerini kullanmadın?
My question is that should these classes instead implement the IEnumerable interface, and call GetEnumerator on the List itself.
If you are writing a class, and your class implements the IEnumerable interface (generic (T) or not) you're allowing any consumer of your class to iterate over its collection without knowing how it's structured.