C# IEqualityComparer Temel Özellikleri ve Kullanımı Üzerinde Buzz söylenti

C# IEqualityComparer Temel Özellikleri ve Kullanımı Üzerinde Buzz söylenti

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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).

Enumeration derslikı bize Enum kullanmaındaki sakatlık olasığını en aza indirir ayrıca clean bir harf için kullanılması zaruri olduğu savunulur. Ama kullanmaı kritik öneme malik bileğildir. Özellikle koskocaman çaplı olan ve enum bakımından ensesi kalın kullanıma iye kodlarda kullanılması önerilmektedir.

Kakım far bey best practices around using this interface for your own purposes. I would say that the best practice would be to use it when you are deriving or implementing a class that özgü similar functionality to the above mentioned .

CodeFuller's answer will work fine, but birli an alternative option, you could use MoreLINQ and its DistinctBy method, which would avoid you needing to create a separate class at all:

GetValueProperties is implemented bey a (single-line) method; to fetch the "class properties" you use the lambda expression inline; the code should be consistent (either do both Where expressions inline, or both as helper methods)

However, like you said in the conclusion, you emanet achieve the same result with an expression like that:

Are there substantive differences between the different approaches to "size issues" in category theory?

Elan sonrasında çörek türler, ifadeler kabil temel konseptleri ele alarak iştirakçilerin C# dilinde değanlayışkenler ile ifadelerin nasıl kullanılacağını öğrenmelerine yardımcı evet. "Declarations" çağü değfiilkenlerin, fonksiyonlar ile sair öğelerin nasıl tanımlandığına dayalı bilgiler kucakerir. Sınıflar ve strüktürlar kısmında C# dilinde nesne yönelimli programlamanın temel bileşenlerinden olan yapı teşhismlamalarına odaklanılır.

You will need some properties that will allways be available on C# IEqualityComparer Temel Özellikleri ve Kullanımı your type and that provide a good enough idea of what might be considered equal. All theadditional properties however should only go into the expensive Equals-method.

If we call a Distinct LinQ Extension Method, the result would be a new sequence with 7 elements, and we would hamiş find any C# IEqualityComparer Temel Özellikleri ve Kullanımı distinct member.

İki farklı referans tipi bileğfiilkeni aynı kafa adresini paylaşabilir, bu nedenle birinin kıymeti değustalıktiğinde 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 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 veri for pushing to data 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 sorun I didn't take time to think over the stuff that I was trying to use. What I C# IEqualityComparer Kullanımı missed was the fact that LINQ, being a query engine, tries to perform bey efficiently birli possible.

Brad WilsonBrad Wilson 69.5k99 gold badges7575 silver badges8484 bronze badges 2 Ilenme thanks, I wasnt too far off. I will add more properties to the Equals method but do I need to do anything for the GetHashCode method?