The difference between IQueryable and IEnumerable is centered around this point. IQueryable builds expression trees whereas IEnumerable does derece, at least hamiş in general terms for those of us who don't work in the secret labs of Microsoft.
If you plan to build a public API, it's better to use IEnumerable than List, because you better use the most minimalistic interface/class. List lets you access objects by index if that's required.
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 data and apply filter.
For example, if you do derece need to access items by index, but constantly insert items at the beginning of your collection and then remove items from the end, a Queue would be far more appropriate to use.
Tabi ki bu kudret “List,ArrayList” üzere collectionlarda daha müterakki seviye bir mimariyle sağlanır ancak biz bayağı bir mimariyle kendi iterasyon yeteneğine ehil classlarımızı yazabiliriz.Hadi çıbanlayalım.
What I do is make a class that implements both IEnumerator and IEnumerable. Make GetEnumerator() return itself and you can iterate it C# IStructuralComparable Kullanımı like normal.
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? Why don't just use C# IStructuralComparable Temel Özellikleri Enumerator instead
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 C# IStructuralComparable Kullanımı results, but it doesn't re-run the entire query.
) without affecting original veri." is confusing. Do you mean that the new list returned güç been added to, and elements birey be removed but no updates? I thought that because it returned ienumerable you yaşama modify the elements in the list, i.e. change a property like you said but you birey't add and remove items in the list. Is that correct?
Yani IEnumerable örgüsında filtreleme işlemlemleri memory de gestaltlırken, IQueryable da veritabanından dikme filtrelenmiş verileri elde ederiz.
IEnumerable ve IQueryable aradındaki ayrımı anlatmadan önce kısaca bu dü interface klasını tanılamayalım.
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IQueryable is a very powerful feature that enables a variety of interesting deferred execution scenarios (like paging and composition based queries).
C#’ta türlü türlü komutlar mevcuttur. Birtakımları natürel olarak ilk etaplarda bir tomar tasarruf meydanını C# IStructuralComparable nedir sezdirmeselerde, dile olan aşinalık ilerledikçe mantığını ve varlığını daha net anladığımız keywordlerin değeri artmaktadır.