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
Note that IEqualityComparer may (and should) be used to perform more complex comparisons, however its implementation won't get much more complex in most cases.
If you don't specify this, the compiler infers the type of T to be BaseClass since BaseClassComparer implements IEqualityComparer.
JustinJustin 86k4949 gold badges226226 silver badges370370 bronze badges Add a comment
This interface allows the implementation of customized equality comparison for collections. That is, you yaşama create your own definition of equality, and specify that this definition be used with a collection type that accepts the IEqualityComparer interface.
örnek olarak form1’bile textboxa eklenen metnin butona tabldığında form2 deki textboxa eklenmesi bağırsakin;
Huzurlaştırmalar koleksiyonun öğeleri beyninde yahut bir öğe ile belirtilen bir fehamet beyninde olabilir. Nesneleri katlaştırmak muhtevain ve default comparerexplicit comparerkavramı vardır.
If a reference is C# IEqualityComparer Nasıl Kullanılır no longer publicly available, should you include the proofs of the results you cite from it?
Going with your example, say that you wanted to compare the objects ignoring case, so that "Apple" and "apple" would be considered the same object. Then your ProductComparer may look like:
What would you expect the type of positions to be? Bey compiler deduces from argument given to Distinct which implements IEqualityComparer, the type of the expression is IEnumerable.
Implementing IEquatable only does a comparion between your object and which is most likely to be the same type. This is performed frequently with the new methods brought in alongside LINQ in 3.5. Overriding Equals() from ValueType will do a check for any C# IEqualityComparer Kullanımı object type, and it’s recommended this is overridden with any custom value type alongside implementing IEquatable.
However, quite frequently we, C# programmers, use classes and want to get rid of duplicated objects in a collection the same C# IEqualityComparer nerelerde kullanılıyor way. Suppose, we do something with actors of a movie:
So now we know how to use IEqualityComparer with LINQ and not make a mess of it. I hope this helps. However, I would like to push C# IEqualityComparer nedir our ActorComparer a little further. Bey you might know, LINQ saf an OrderBy(..) extension method that allows us to sort a collection according to some key.
şart sıfır sınıf C# IEqualityComparer Nasıl Kullanılır ve bünyelar, birincil konstrüksiyonlandırıcı parametreleri derunin her saat bu davranışı istemeyebilir.