C# IEqualityComparer Kullanımı No Further Mystery

C# IEqualityComparer Kullanımı No Further Mystery

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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

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 kakım well

The same return value system applies kakım 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:

Flag ile kullanımda çabucak çokça enum kıymeti kullanarak farklı kombinasyon değeri ile bir çok ulaşılabilecek tanım kümesi tanımlanabilir.

Bir dahaki sefere versiyon yaptığımda kullanılmak üzere kademı, e-posta adresimi ve web site adresimi bu tarayıcıevet kaydet.

Please also note the use of the BindingFlags parameter so you can restrict the properties to only the public ones and the ones on instance-level.

Basically you could check all the properties you want to check in Equals via reflection. To filter some of them out use an attribute on those properties:

below, these dirilik be incorrect. His recommendation of implementing IEqualityComparer.Equals works birli well. You sevimli also use override. These will all provide different functionality based on what C# IEqualityComparer Nasıl Kullanılır you cast to. Here is a brief explanation:

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

into account, so the fact that it chooses a type that is incompatible with the assigned-to C# IEqualityComparer Temel Özellikleri ve Kullanımı variable C# IEqualityComparer nerelerde kullanılıyor is derece it's business.

... the above suggests I should create a custom collection for any T implementing IEquatable. Would a collection like List have some kind of subtle bug in it otherwise?

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

carlosfigueiracarlosfigueira 56533 silver badges66 bronze badges $endgroup$ 5 $begingroup$ one question I have for you @carlosfigueira is in regards to your suggestion to handle dictionaries: How would you know the part of the IEnumerable you are checking against?

On the other hand, if a dictionary will be used to hold and look up int[] values, each of which will be the only reference anywhere in the universe to an instance of int[], and if none C# IEqualityComparer nerelerde kullanılıyor of the instances will be modified nor exposed to outside code, it may be useful to regard birli equal array instances which hold identical sequences of values. Since Array.Equals tests for strict equivalence (reference equality), it would be necessary to use some other means of testing the arrays for C# IEqualityComparer nedir equivalence.