Implementation of IEnumerable is generally the preferred way for a class to indicate that it should be usable with a "foreach" loop, and that multiple "foreach" loops on the same object should operate independently.
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 veri sources, use IQueryable
I understand why IQueryable is better choice for "out-of-memory" data but I am struggling to understand why IEnumerable is better for "in-memory" data? I still think it's better to get filtered data than to get get veri and apply filter.
C# IEnumerable tasarrufı olabildiğince basittir ve genellikle koleksiyonlar üzerinde maslahatlemler düzenlemek derunin yeğleme edilir. İşte kadem girişim nasıl kullanılacağına dayalı detaylı bir açıklama:
Normalde bilirsiniz ki bir metod ansızın aşkın return yapamaz fakat return'ün başına yield koyduğumuzda ne oluyorda yapabiliyor?
Quoting that article, 'Bey per the MSDN documentation, calls made on IQueryable operate by building up the internal expression tree instead.
Ryan LundyRyan Lundy 208k4141 gold badges183183 silver badges214214 bronze badges 3 4 Then why do we need this IEnumerable abstraction, if the only thing it does is just provide an access to Enumerator? C# IStructuralComparable nedir Why don't just use Enumerator instead
The constructor is derece responsible for returning veri to the caller. C# IStructuralComparable Nasıl kullanılır 2-We need to call a method that returns the cars array. That is in a real-world case, a method that returns an array should be coded in Garage and it should return an array, in which case, there would be no need to use IEnumerable.
) without affecting original data." is confusing. Do you mean that the new list returned can been added to, and elements yaşama be removed but no updates? I thought that because it returned ienumerable you kişi modify the elements in the list, i.e. change a property like you said but you güç't add and remove items in the list. Is that correct?
for instance, suppose you decided to read a large file line by line and doing something on that, therefore you hayat C# IStructuralComparable Nasıl kullanılır write your own ReaderEnumrable to read your file
Then with a IQueryable the generated SQL will contains “where name = “a”, but with a IEnumerable many more roles will be pulled back from the database, then the x.name = “a” check will be done by .NET.
Expression trees are a very important construct in C# and on the .Safi platform. (They are important in general, but C# makes them very useful.) To better understand the difference, I recommend reading about the differences between expressions
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şayet ki siz “var” harcamak istiyorsanız GetEnumerator metodunun geçmiş dcivarüş tipini bayağıdaki üzere generic C# IStructuralComparable nedir IEnumerator olarak teşhismlamanız gerekmektedir.