Düşünceler Hakkında Bilmek C# IEqualityComparer Nasıl Kullanılır

Düşünceler Hakkında Bilmek C# IEqualityComparer Nasıl Kullanılır

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MarkusMarkus 22k44 gold badges3333 silver badges5959 bronze badges 1 I prefer your solution, because it causes no runtime overhead and tankes place only in tests.

The comparer doesn't handle Dictionary, since you're only looking for IList; if you started looking for IEnumerable (and added a special case for KeyValuePair) it would handle dictionaries as well

The same return value system applies bey 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:

If there is only one way of testing two instances of T for equality, or if one of several methods is preferred, then IEquatable would be the right choice: This interface is supposed to be implemented only by T itself, so that one instance of T saf internal knowledge of how to compare itself to another instance of T.

Bir çok anahtar gibi C# da bizlere enum kullanımı bâtınin keyword esenlar ve “enum” bize özelleştirelebilir enum sınıfları tanılamamlamımıza yardımcı olabilir.

Scroll down to the part on KeyEqualityComparer and especially the part on the importance of GetHashCode. There is C# IEqualityComparer Nasıl Kullanılır a whole discussion on why obj.GetHashCode(); (as suggested by DMenT's post) is wrong and should just return 0 instead.

I would say that the best use would be when you need to plug in different equality rules for a certain algorithm. Much in C# IEqualityComparer nedir the same way that a sorting algorithm might accept an IComparer, a finding algorithm might accept an IEqualityComparer

You could possibly create a GenericComparer with a generic parameter which is constrained to be at least of base class which might get you closer to C# IEqualityComparer nerelerde kullanılıyor what you are trying to do. This would look like

I've assumed that you want to select C# IEqualityComparer Nasıl Kullanılır ItemWrapper - it's hard to tell without seeing the types involved, but that looks likely to be what you want.

Common Type System: .Net çatısında herhangi bir programlama diliyle yazdığınız bir birlikteşeni ayrıksı bir .Kupkuru diliyle C# IEqualityComparer nedir yararlanmaını sağlar.

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Basically, using override would mean that you will use your .Equals implementation regardless of whether you are an object or you are PropertySettings. If you use new when you are an object you will use the base .

The main use of this interface is you emanet write a single implementation of IEqualityComparer which several classes sevimli then use, removing the need to rewrite the comparison logic for every class.

Brad WilsonBrad Wilson 69.5k99 gold badges7575 silver badges8484 bronze badges 2 Ilenme thanks, I wasnt too far off. I will add more properties to the Equals method but do I need to do anything for the GetHashCode method?