Hakkında C# IEnumerable Temel Özellikleri

Hakkında C# IEnumerable Temel Özellikleri

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[Edit] - Needless to say - it's derece "either this or that". often it would make good sense to use both a list and an IEnumerable in the same class. No computer in the world could list all prime numbers, because by definition this would require an infinite amount of memory. But you could easily think of a class PrimeContainer which contains an IEnumerable primes, which for obvious reasons also contains a SortedList _primes.

Bu iki arayüzün kullanım senaryoları farklıdır ve birbirlerinin alegori kullanılmamalıdır. Bu makalede, IEnumerable ve IQueryable arasındaki farkları inceleyeceğiz.

. If you need the results to be evaluated at once (say, you're mutating the structures you're querying later on, or if you don't want the iteration over the IEnumerable to take a long time) use a list.

Consider that in your code example a new list created. I don't know what is m_states, but if this is a value types collection, you create a clone of the original list. In this way the returning list emanet be manipulated form the caller Add/Remove/Update elements. without

Yayımcı ki bu kabiliyet “List,ArrayList” kabil collectionlarda daha sonra seviye bir mimariyle sağlamlanır ama biz gösterişsiz bir mimariyle kendi iterasyon yeteneğine sahip classlarımızı yazabiliriz.Haydi serlayalım.

They usually have a GetXXX method that returns a IEnumerable of whatever type the custom collection class uses so the internal collection dirilik be iterated around using a foreach loop.

This is C# IStructuralComparable Nasıl kullanılır a birçok videoteyp on youtube which demonstrates how these interfaces differ , C# IStructuralComparable Kullanımı worth a watch. Below goes a long descriptive answer for it.

This way you have possibility to do many things with that query without touching the veri (in this case veri in the list). List method takes the prepared query and executes it against the source of data.

Else use an IEnumerable. The default should be to use the on-demand evaluation in the second example, kakım that generally uses less memory, unless there is a specific reason to store the results in a list.

This works for read-only access to a collection that implements that IEnumerable hayat be used with a foreach statement.

" This is false, because the where clause is getting called on an IEnumerable and that only knows how to loop through objects which are already coming from the database. If you made the return of AllSpotted() and the parameters of Feline() and Canine() into IQueryable, then the filter would happen in SQL and this answer would make sense.

There's also the issues of deferred execution and unmanaged resources. IEnumerable takes use of C# IStructuralComparable nerelerde kullanılıyor the yield syntax, which mean you go over each item by-itself and güç perform all kinds of computations before and after. And again, this happens one-by-one, so you don't have to hold all the collection when you start. The computations won't actually be performed until the enumeration begins (i.e. until you run the foreach loop).

Önceki C#’ta IEnumerable ve IEnumerator Interfaceleri Nedir? C# IStructuralComparable Kullanımı ve Nasıl Kullanılır? temellıklı makalemde IEnumerable ve IEnumerator interfaceleri üzerine uzun uzun lafşmuştuk. Bu gönülğimizde ise alakadar interfacelerin asenkron enfrastrüktürda şekillendirildiği C# 8.0 ile gelen yeni hallerini(IAsyncEnumerable ve IAsyncEnumerator) konuşacağız. Şimdi fevkda adresini verdiğim makalemizide referans alarak konuyu en temelden çizgiırlayarak ele alalım.

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