2 Dakika Kural için C# IEnumerable Temel Özellikleri

GetEnumerator(); Örneğimizde bir “Personel” klası oluşturup, “Personeller” sınıfı içerisinde müteallik dershaneın derlem yapkaloriı ve bu koleksiyona veri ekleme mesleklevini fail Add metodunu tanımladım. GetEnumerator metodu içinde ise koleksiyonumuzun GetEnumerator() metodu sayesinde bir enumerator elde yazar return ettim.

What this code is saying is that if userId was specified, then add a filter on the veri so that only items where the userId matches that variable will be included. That same thing is done for email and lastFourdigits.

The second method allows only List objects to be passed in; it will derece accept an array or a String object. Obviously, the first method is better because it is much more flexible and sevimli be used in a much wider range of scenarios.

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.

An IEnumerator is a thing that sevimli enumerate: it saf the Current property and the MoveNext and Reset methods (which in .Safi code you probably won't call explicitly, though you could).

Basically it özgü a method to get the next item in the collection. It doesn't need the whole collection to be in memory and doesn't know how many items are in it, foreach just keeps getting the next item until it runs out.

So if I am going through all the items on ebay, one at a time would be something even a small computer birey handle, but ".ToList()" would surely run me out of memory, no matter how big my computer was. No C# IEnumerable Kullanımı computer gönül by itself contain and handle such a huge amount of data.

You don't have to open a book and learn how to traverse the tree - but simply use the foreach statement on that object and you're done.)

Where the C# IEnumerable Kullanımı execution of a query is going to be performed "in process", typically all that's required is the code (bey code) C# IEnumerable Nedir to execute each part of the query.

Marc GravellMarc Gravell 1.0m271271 gold badges2.6k2.6k silver badges2.9k2.9k bronze badges 1 1 The mistake with C# IEnumerable Temel Özellikleri "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 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.

Aşağıdaki sınıfta yapmış olduklarımızı etap adım anlatmadan önce eğer bir sınıfa IEnumerator implemente edilirse ne metotların implement olacağına bileğinmek isterim. Düzenlediğim haliyle dundaki harf yapkaloriı inceleyelim;

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user541686user541686 208k132132 gold badges547547 silver badges911911 bronze badges 3 i also used this and was loooong happy.

Here is why C# IEnumerable Nasıl Kullanılır it loads twice birli fewer items as the first example on average. Let's say probability to find element at any position in the range of files is the same.