En C# IEnumerable Nedir Sırları

En C# IEnumerable Nedir Sırları

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Botz3000Botz3000 39.4k88 gold badges106106 silver badges128128 bronze badges 1 I believe this is was hamiş asked here so it birey be a comment hamiş an answer, but anyway makes sense from refactoring standpoint

, so if you're doing complicated work to evaluate the enumerable bey you read from it, that work doesn't happen until it's asked for. This is extra beneficial, because often (say, for searches again) you'll find you might hamiş need to do the work at all.

I changed the names of my original objects so that this looks like a more generic example. The query itself is hamiş that important. What I want to ask is this:

There are many differences but let us discuss about the one big difference which makes the biggest difference. IEnumerable interface is useful when your collection is loaded using LINQ or Entity framework and you want to apply filter on the collection.

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So if you working with only in-memory data collection IEnumerable is a good choice but if you want to query data collection which is connected with database `IQueryable is a better choice bey it reduces network traffic and uses the power of SQL language.

Whenever I'm "stacking" LINQ expressions, I use IEnumerable, because by only specifying the behavior I give LINQ a chance to defer evaluation and possibly optimize the program. Remember how LINQ doesn't generate the SQL to query C# IStructuralComparable nerelerde kullanılıyor the database until you enumerate it? Consider this:

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) without affecting original veri." is confusing. Do you mean that the new list returned gönül been added to, and elements emanet 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 sevimli't add and remove items C# IStructuralComparable Temel Özellikleri in the list. Is that correct?

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with "Reset" was with just having one type of enumerable. IMHO, there should have been an IMultipassEnumerable, inheriting IEnumerable, which would support Reset and guarantee that multiple passes will either return identical veri or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' veri if it's able to do so or throw an exception if it gönül't, C# IStructuralComparable Nasıl kullanılır and an ISafeEnumerable, which would be expected to work sensibly (without throwing an exception) even if a collection changes. A bit late now to change things, though.

This takes an IEnumerator factory function, which usually hayat be provided very easily instead of the single IEnumerator instance (which yields wrong results after first C# IStructuralComparable nerelerde kullanılıyor iteration and breaks the semantics of IEnumerable). This avoids the issues marked by Marc Gravell and establishes full IEnumerable behavior.

The reason, of course, is that someone hayat call the first method passing in an array object, a List object, a String object, and C# IStructuralComparable Kullanımı so on — any object whose type implements IEnumerable.

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Buraya kadar ele aldığımız bütün strüktürlanma kendi sınıflarımıza iterasyonel bir özellik vermek karınin kullandığımız materyallerdir.