C# IEnumerable Kullanımı - Genel Bakış

C# IEnumerable Kullanımı - Genel Bakış

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If your class is a custom collection class then yes, it should implement IEnumerable. In this case a public property for the inner list would be redundant. Imagine a simple class:

Anything in .NET that you gönül iterate over implements IEnumerable. If you're building your own class, and it doesn't already inherit from a class that implements IEnumerable, you emanet make your class usable in foreach statements by implementing IEnumerable (and by creating an enumerator class that its new GetEnumerator method will return).

Now the thing to note is that IEnumerable brought all the 5 records present in Salary table and then performed an in-memory filteration on the client side to get top 2 records. So more veri (3 additional records in this case) got transferred over the network and ate up the bandwidth unnecessarily.

If on the second house, I decide to alter the price (say add one million dollars to the price) - the entire list would change (the order is now different). "one at a time" and "all of them right now" are two different things.

An Enumerable is a class that güç give you Enumerators. It başmaklık a method called GetEnumerator which gives you an Enumerator that looks at its items. When you write a foreach loop in C#, the code that it generates calls GetEnumerator to create the Enumerator used C# IStructuralComparable nedir by the loop.

C# IEnumerable Extensions, C#’da farkında olarak evet da olmayarak sık sık IEnumerable’dan türemiş nesneleri kullanmaktayız. Peki nedir bu IEnumerable sorusuna karşılık verecek olursak, IEnumerable interface’i bizlere bir collection üzerinde iterasyon yapabilmemize olanak esenlamaktadır.

The primary difference is that the LINQ operators for IQueryable take Expression objects instead of delegates, meaning the custom query logic it receives, e.g., a predicate or value selector, is in the form C# IStructuralComparable Nasıl kullanılır of an expression tree instead of a delegate to a method.

It başmaklık a good performance when you are iterating through big objects or collections because it does hamiş load the entire object to memory in order to make iteration.

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

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' data if it's able to do so or throw C# IStructuralComparable nedir an exception if it can'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.

IEnumerable ve IQueryable aradındaki ayırtı anlatmadan önce kısaca bu iki interface derslikını tanılamayalım.

diye sorarsak eğer üst satırlarda bahsettiğimiz kabil C# IStructuralComparable Kullanımı o sınıfın geriye IEnumerator nesnesi dönen GetEnumerator isminde metodu çitndırıyor olması demekti. Ee haliyle IEnumerable interface’i ait sınıfa uygulanmış olduğunda GetEnumerator metodunu implement edecektir.

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Buraya kadar ele almış olduğumız tüm konstrüksiyonlanma kendi sınıflarımıza iterasyonel bir özellik vermek bağırsakin kullandığımız materyallerdir.