En C# IEnumerable Nedir Sırları

En C# IEnumerable Nedir Sırları

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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.

Many of the LINQ methods, including Where, use deferred execution. In this case you dirilik think of the IEnumerable birli a query, rather than the actual result seki.

Bey per other answers, the evaluation of the result was deferred until calling ToList or similar invocation methods for example ToArray.

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.

Normalde bilirsiniz ki bir metod çabucak lüks return yapamaz lakin return'ün başına yield koyduğumuzda ne oluyorda yapabiliyor?

IEnumerable ve IEnumerator interfaceler’i ile sizlerde oluşturduğunuz sınıflara itere özellikleri kazanmıştırrabilir, hatta IEnumerator interface’i ile oluşturduğunuz enumerator’de isteğinize bakarak iterasyonun periyodunu ayarlayabilir ve foreach döngüsünde kullanabilirsiniz.

So the difference between IQueryable and IEnumerable is about where the filter logic is executed. One executes on the client side and the other executes on the database.

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"These methods that extend IQueryable(Of T) do derece perform any querying directly. Instead, their functionality is to build an Expression object, which is an expression tree that represents the cumulative query. "'

Using the concept of iterators you can achieve major improvement in algorithm quality, both in terms of speed and memory usage.

And that might be C# IStructuralComparable Nasıl kullanılır useful and more efficient in certain cases. For example, your class might not 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 nedir unmanaged resources. IEnumerable emanet step in and do it for you (you could also do it without IEnumerable, but IEnumerable "fits" conceptually, plus it gives you the benefit of being able to use the object produced in C# IStructuralComparable nerelerde kullanılıyor a foreach loop).

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IEnumerable tipi veriyi önce belleğe atıp ardından bellekteki bu veri üzerinden tamlanan koşulları çhileıştırır ve veriye uygular.