Definitive Guide C# IEqualityComparer Temel Özellikleri ve Kullanımı için

Definitive Guide C# IEqualityComparer Temel Özellikleri ve Kullanımı için

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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).

I'd also suggest small refactoring of FamilySelector class. Currently it holds the veri and performs comparison. Usually implementation of IEqualityComparer is a data-less class that just performs a comparison:

The same return value system applies as IComparer. The difference between this and IComparer is IComparable will be implemented on the class that contains your field values, while IComparable derived classes are used for custom sorting. So for example:

What's the necessary and sufficient condition for a real sequence to be written bey the self-convolution of another real sequence?

The IEqualityComparer interface supports only equality comparisons. Customization of comparisons for sorting and ordering is provided by the IComparer interface.

Properties Default Returns a default equality comparer for the type specified by the generic argument.

Bu özellik, engelli kullanıcılar derunin görüntülük şarkıcı mukayyetmlar veya özge yardımcı teknolojiler aracılığıyla kullanılabilir.

Fields emanet be null — appears if there are any nullable fields or properties in your type. By default, this checkbox is selected, meaning that C# IEqualityComparer nedir ReSharper will generate null checks for selected fields. You gönül clear this checkbox if you do not need null checks.

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Eric's answer explains the root cause C# IEqualityComparer Kullanımı of the whole issue (in terms of covariance and contravariance).

I think the other post you mention is saying that EqualityComparer implements IEqualityComparer and IEqualityComparer, so you don't C# IEqualityComparer nerelerde kullanılıyor have to implement both the generic and non-generic interfaces if you derive from EqualityComparer.

So there you go. In this situation, C# IEqualityComparer nerelerde kullanılıyor type inference chooses the more general type and infers that the call means Distinct. C# IEqualityComparer nerelerde kullanılıyor Type inference never takes the return type

Typically I'd write MyCustomeComparer which implements IEqualityComparer and pass a MyCustomeComparer object around to whichever objects that need it - I'm sure you're aware of this usage.

Her dü öğretici bile kullanıcıların C# dilinin temellerini kavramalarını sağlamak üzere detaylı ve kadem hamle örneklerle zenginleştirilmiştir.