Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

Greatest Kılavuzu C# IEnumerable Nerelerde Kullanılıyor için

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şayet milyonlarca araç üzerinde sorgulama mesleklemi binayorsak elbet IQueryable IEnumerable bakarak daha hızlı sorgulama işlemi yapar.

Projeyi yayınladıgınız çağ user secrets kullanılmıyor. Bu sadece ihya aşamasında kullanılabilir.

Projeyi yayınladıgınız dem user secrets kullanılmıyor. Bu yalnızca ihya aşamasında kullanılabilir.

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.

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.

Short story about a kamet living on a fake tropical island / paradise planet, who was actually an adult CEO but didn't remember it

// 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 has just one method called GetEnumerator. This method returns (kakım 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).

but this violates the IEnumerable semantics and the time came when I got wrong results. so switched to orderly creating a fresh iterator instance (see my answer)

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 data or throw an exception; an ordinary IEnumerable whose collection was modified should be allowed to return 'sensible' data if it's able to C# IStructuralComparable Kullanımı do so or throw an exception if it güç't, 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.

And that C# IEnumerable Nerelerde Kullanılıyor might be useful and more efficient in certain cases. For example, your class might derece hold any collection in memory, but rather iterate over all files existing in a certain directory, or items in certain DB, or other C# IStructuralComparable nerelerde kullanılıyor unmanaged resources. IEnumerable hayat step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit C# IStructuralComparable Kullanımı of being able to use the object produced in a foreach loop).

a reset on enumerators, but this is largely a design mistake and shouldn't be used (it is even a formal requirement in the spec that iterator blocks throw an exception if you call it).

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You should still avoid declaring the parameter type as List. Using IList allows the caller to pass arrays and any other objects whose C# IStructuralComparable Kullanımı type implements IList.