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).
When testing two instances for equality you have to make an explicit choice of which IEqualityComparer instance to use.
Bey far as 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 saf similar functionality to the above mentioned .
$begingroup$ I have a custom PropertiesByValueComparer and am fairly happy how it behaves for simple classes. I haven't included comparing by fields yet. Is there anything that is blatantly fail about this, or do you have other recommendations?
IEqualityComparer is an interface for an object that performs the comparison on two objects of the type T.
Bir sınıfa temel örgülandırıcı izafe etmek, derleyicinin otomatik olarak parametresiz bir mimarilandırıcı oluşturmasını engeller. Dokumada, otomatik olarak oluşturulan parametresiz kuruluşlandırıcı, tüm alanları, temel yapılandırıcı parametrelerini bile bağırsakerecek şekilde 0-bit deseniyle esaslatır.
I now need C# IEqualityComparer Nasıl Kullanılır to do distinct on a collections of some of these objects. I have the following code over and over for each of the child classes:
@pinkfloydx33 Your comment C# IEqualityComparer Nasıl Kullanılır is the correct answer btw. OP just messed up the interface they need to C# IEqualityComparer nedir implement.
同値性の判断が必要か、必要であればその基準が「参照の一致」で良いのか、「値の一致」が必要なのかを考えましょう。
If it is possible, dirilik we add an attribute to a property to C# IEqualityComparer Kullanımı say that this property is hamiş relevant in the comparison?
Örnekte, kullanıcıların bedel olup olmadığını denetleme ederken kullanıcı adları dikkate münfailtır.
Good news is that this same Distinct() method works for collections of our custom objects too. So if George Clooney accidentally creeps into our collection twice that's not a sıkıntı:
The same goes for the LINQ operators that accept a comparer. But again, always consider if the equatable behavior that should be intrinsic to the class rather than defined externally.
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 C# IEqualityComparer Kullanımı your paradigma a bit? yes? no?