Için basit anahtar C# IEqualityComparer nedir örtüsünü

Için basit anahtar C# IEqualityComparer nedir örtüsünü

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Also it is unclear why GetHashCode takes only value properties into account. Even though it will definitely work but looks a little bit strange. Maybe you should add a comment why class properties

GitHub'da bizimle ortaklaşa iş mimarin Bu hapishaneğin kaynağı GitHub'da bulunabilir; burada ayrıca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Daha okkalı marifet muhtevain yardımda mevcut kılavuzumuzu inceleyin.

Besides, it allows to use more than one property birli a key, so the next call is absolutely valid and will preserve all actors with the same last name as long birli their first names differ:

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GetValueProperties is implemented as 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 kakım helper methods)

This is because LINQ methods accept IEnumerable as a parameter. Consequently, they have no C# IEqualityComparer Kullanımı concept of the implementation of the original list.

The issue here is that comparing floating-point numbers C# IEqualityComparer Kullanımı for equality might derece work birli expected, due to minute rounding errors. There are different methods of comparing floating-point numbers for near-equality

While MSDN is C# IEqualityComparer nedir a valuable resource, don't take everything MSDN says as gospel. MSDN contains plenty of bad advice, outdated, badly written or plain wrong content.

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– Eric Lippert Commented Apr 8, 2013 at 16:01 @EricLippert: What difficulties would arise if one allowed return type to be considered in method overloading only in cases where the return type was either being coerced to a particular type, or was passed to a method where all overloads of proper arity had the same type for that parameter (e.

As we gönül see, to satisfy the interface, we need to implement two methods: C# IEqualityComparer nerelerde kullanılıyor Equals and GetHashCode. Additionally, we need to take note that this interface is a contravariant interface.

2 It affects other places in a positive way, you generally want to implement it for a data class like this

GitHub'da bizimle işbirliği örgün Bu dâhilğin kaynağı GitHub'da bulunabilir; burada başkaca sorunları ve çekme isteklerini oluşturup gözden geçirebilirsiniz. Elan ziyade fen ciğerin ulamada bulunan kılavuzumuzu inceleyin.

PS. I don't think any custom Equals methods work with entity C# IEqualityComparer Temel Özellikleri ve Kullanımı framework directly on the database side (I think you know this because you do AsEnumerable) but this is a much simpler method to do a simple Equals for the general case.