Temel İlkeleri C# IEqualityComparer nerelerde kullanılıyor

Temel İlkeleri C# IEqualityComparer nerelerde kullanılıyor

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Here, you'll find a first simple code sample that works only on simple types (the ones composed only by primitif properties), and a second one that is complete (for a wider range of classes and complex types).

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The same return value system applies birli IComparer. The difference between this and IComparer is IComparable will be implemented on the class that contains your field values, while IComparable derived classes are used for custom sorting. So for example:

I would like to get distinct objects from a list. I tried to implement IEqualityComparer but wasn't successful. Please review my code and give me an explanation for IEqualityComparer. public class Message

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Scroll down to the part on KeyEqualityComparer and especially the part on the importance of GetHashCode. There is a whole C# IEqualityComparer nedir discussion on why obj.GetHashCode(); (kakım suggested by DMenT's post) is wrong and should just return 0 instead.

I would say that the best use would be when you need to plug in different equality rules for a certain algorithm. Much in the same way that a sorting algorithm might accept an IComparer, a finding algorithm might accept an IEqualityComparer

@pinkfloydx33 Your comment is the correct answer btw. OP just messed up the interface they need to implement.

同値性の判断が必要か、必要であればその基準が「参照の一致」で良いのか、「値の一致」が必要なのかを考えましょう。

I've tried using LINQ SequenceEqual but again kakım the instances of T are different this returns false;

ümit ederim bilgelik mahmul bu makale, C# ve .Kemiksiz geliştiricilerine rehberlik ederken C# IEqualityComparer Nasıl Kullanılır ilham donör olmuşdolaşma!

Bu ağırşak, deneyimli eğitmenler eşliğinde C#’da Nesne Yönelimli Programlama prensiplerini ve uygulamalarını öğrenmenize imkân tanılamar. Bu çörek yardımıyla yazılı sınavm ihya yeteneklerinizi geliştirebilir ve iş dünyasında muteber bir teknik kazanabilirsiniz.

What Distinct() actually does here is comparing object references. So our second George Clooney is in fact an independent object (since it was created C# IEqualityComparer Kullanımı independently) and its reference differs from the reference of the first one - therefore it appears in the output twice:

Equals/GetHashCode C# IEqualityComparer Nasıl Kullanılır not only internalizes comparison logic, but also globalize them. There might be cases where I would like internal comparison (not using C# IEqualityComparer nerelerde kullanılıyor collection) for just one time.