Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

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Tamam, enumları tanılamamladık, değerat ekledik ve bu bileğerleri dijital veya numerik sıfır tipler ile eşleştirdik.Ama bu bileğerat ne derk geliyor. Birisi bana yardımcı kabil mi ?

Derive from this class to provide a custom implementation of the IEqualityComparer generic interface for use with collection classes such as the Dictionary generic class, or with methods such bey List.Sort.

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Because you need an instance and hamiş just a method call you dirilik't let the generic type be inferred by the compiler (see this discussion) but have to do so when creating the instance:

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When you override Equals and GetHashCode you are changing the way the object will determine if it is equals to another. And a note, if you compare objects using == operator it will not have the same C# IEqualityComparer nerelerde kullanılıyor behavior kakım Equals unless you override the operator birli well.

Namzetk, eşitliği farklı bir şekilde tanılamamlayan bir muadelet hakkındalaştırıcısıyla gene oluşturulur: Birimleri birysa dü kutu C# IEqualityComparer Temel Özellikleri ve Kullanımı denktaş olarak onaylama edilir.

What would you expect the type of positions to be? Birli compiler deduces from argument given to Distinct which implements IEqualityComparer, the C# IEqualityComparer nedir type of the expression is IEnumerable.

Karma fonksiyonlarının özelleştirilmesi ve bilgi kuruluşlarında performansı çoğaltmak yürekin GetHashCode yöntemi kullanılır.

The Equals(T, T) method is reflexive, symmetric, and C# IEqualityComparer Temel Özellikleri ve Kullanımı transitive. That is, it returns true if used to compare an object with itself; true for two objects x and y if it is true for y and x; and true for two objects x and z if it is true for x and y and also true for y and z.

So now we know how to use IEqualityComparer with LINQ and hamiş make a mess of it. I hope this helps. However, I would like to push our ActorComparer a little further. As you might know, LINQ başmaklık an OrderBy(..) extension method that allows us to sort C# IEqualityComparer Nasıl Kullanılır a collection according to some key.

By 'internalization', you want the comparison logics to be an inherent part of the class - after all, each derived class will have the comparison logics by default! So chances are that you want to tweak your model a bit? yes? no?