IEqualityComparer is a generic .Kemiksiz interface that allows implementing customized equality comparison for collections.
This way, you yaşama implement a test that fails if any properties are added. Of course, you'd have to add new properties to the array at the beginning. As using reflection is an expensive operation from a performance point of view, I'd propose to use it in the sınav, hamiş in the comparer itself if you need to compare lots of objects.
Alternatively, you hayat write an empty comparer class that implements IEqualityComparer, and then pick the corresponding quick-fix from the Zir+Enter menu:
List klası tanımlanırken T tip değsorunkenini alır. Kısaca listenin muhteviyatında ne türden nesne yada değteamülkenlerin olacağını belirler.
Burada Buffer10 adında bir yapı (struct) kullanılarak inline bir seri oluşturuyoruz. Bu yapı, InlineArrayAttribute ile medarımaişetaretlenmiştir ve 10 elemanlı bir kol temsil değer. İlk 10 skornın karesini hesaplayarak ve yazdırarak bu inline diziyi kullanıyoruz.
If you change your class to implement IEquatable instead, the implementation of Distinct (which will use EqualityComparer.Default which in turn sees your type implements IEquatable and delegates to that) will work kakım you expect.
The issue here is that comparing floating-point numbers for equality might hamiş work as expected, due to minute rounding C# IEqualityComparer nerelerde kullanılıyor errors. There are different methods of comparing floating-point numbers for near-equality
While MSDN is a valuable resource, don't take everything MSDN says birli gospel. MSDN contains plenty of bad advice, outdated, badly written or plain wrong content.
In the editor, place the caret at the type name or within a type C# IEqualityComparer nerelerde kullanılıyor at the line where you want to insert an equality comparer class. If the caret is on the type name, the generated code will be added in the beginning of the type C# IEqualityComparer Kullanımı declaration.
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You could be passing, via extension method, a ReadOnlyCollection and they would still be able C# IEqualityComparer Kullanımı to evaluate through it. They cannot, then, alter the original collection, because the original collection could be written in any number of ways.
You could do this more elegantly using FluentAssertions library. It saf plenty assertion methods for collections.
What Distinct() actually does here is comparing object references. So our second George Clooney is in fact an independent object (since it was created independently) and its reference differs from the reference of the first one - therefore it appears in the output twice:
The result is the same bey when using the first version of ActorComparer, although the new one is much more flexible in the sense that it may be used differently in different contexts and no further modifications are required to its code.