Küçük C# IEqualityComparer Temel Özellikleri ve Kullanımı Hakkında Gerçekler Bilinen.

Küçük C# IEqualityComparer Temel Özellikleri ve Kullanımı Hakkında Gerçekler Bilinen.

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Tanılamamladığımız enum’ın bütün elemanlarını listelemek istersek bu harf bize katiyen yardımcı olacaktır.

Listeye eleman eklemenin bir değişik yolu da AddRange metodunu kullanarak, bir ayrıksı listeyi yek seferde eklemektir.

Cevapla ↓ 21 سعید محمد 3 sene önce I love your blog.. very birçok colors & theme. Did you create this website yourself or did you hire someone to do it for you?

When writing programs in C# with the help of LINQ I have come across the IEqualityComparer generic interface several times. The name conveys the purpose of the interface clearly, still, surprisingly, my first attempts to apply it were marked by strong confusion - the thing merely didn't work the way I wanted it to. Moreover, after going to Google and StackOverflow I have noticed that I'm hamiş the only one to face difficulties with it.

In other words support the use of this interface if you are developing a custom collection and you want to allow your consumers to control equality which is used in a number of LINQ and collection related methods (eg. Sort).

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 bey you expect.

However you should have some good pre-checks within GetHashCode to avoid unneccessary calls to this slow method.

We’ll write a classic implementation of IEqualityComparer class. C# IEqualityComparer nedir In our example, we need to compare customers. Two customers are distinct if your first char Name is different.

Where did the pronunciation of the word "kilometer/kilometre" as "kl OM iter" rather than "KILL o meeter" originate?

into account, so the fact that it chooses a type that is incompatible with the assigned-to variable is hamiş it's business.

İki farklı referans tipi bileğçalışmakeni aynı hafıza adresini paylaşabilir, bu nedenle birinin değeri değiştiğinde diğerini etkileyebilir.

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And yes, after this the output of the izlence doesn't change at all. So, what the hell is LINQ doing and why doesn't it even try to C# IEqualityComparer Nasıl Kullanılır use the equality comparer that we have provided? The situation was even bitter for me because I was trying to use Distinct() combined with custom equality comparer to prepare data for pushing to veri base, so I ended up with SQL Server telling me that I am breaking a primary key constraint. Because of being focused on a broader problem I didn't take time to think over the stuff that I was trying to use. What I missed was the fact that LINQ, being a query engine, tries to perform bey efficiently kakım possible.

It is all very C# IEqualityComparer nerelerde kullanılıyor easy when the context is an assignment to a variable of stated type, but what if the variable is var? What if the context is itself in C# IEqualityComparer nerelerde kullanılıyor the argument call to a method? Now we have to do C# IEqualityComparer nedir overload resolution problems on that method in order to figure out which one compiles.