T türü iki arabirimi bile uygulamazsa varsayılan karşılaştırıcı yoktur ve bir hakkındalaştırıcı yahut mukabillaştırma temsilcisi yalınlıkça sağlanmalıdır.
If you want a generic solution that creates an IEqualityComparer for your class based on a property (which acts birli a key) of that class have a look at this:
The CompareTo method would be the default way of ordering your User class, perhaps comparing by Name. If you then decided that you wanted to sort a list of User objects by another property, say Age, you could write a class that implemented IComparer instead of altering CompareTo inside User. This would perform the custom sorting, for example:
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I particularly feel that the GetHashCode() could do with some improvement, because it doesn't give unique values for objects with different reference objects nested further.
Therefore, when testing two instances of T for equality, because T has no internal understanding of equality, you will have to make an explicit choice of a IEqualityComparer instance which performs the sınav according to your specific requirements.
I would say that the best use would be when you need to plug in different equality rules for a certain algorithm. Much in the same way that a sorting algorithm might accept an IComparer, a finding algorithm might accept an IEqualityComparer
Comparing types is optional and depends on your inheritance structure, but in this case, C# IEqualityComparer Nasıl Kullanılır if the two players aren’t the same type, then they are not equal.
This interface allows the implementation of customized equality comparison for collections. That is, you emanet create your own definition of equality, and specify that this definition be used with a collection type that accepts the IEqualityComparer interface.
Comparer name prefix — allows you to specify a prefix that will be used in the name of the generated comparer class.
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According to this thinking, both types should implement IEquatable, because it doesn't C# IEqualityComparer nedir seem likely that there are other meaningful ways of doing an equality sınav.
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On the other hand, if a dictionary will be used to hold and look up int[] values, each of which will be the only C# IEqualityComparer Nasıl Kullanılır reference anywhere in the universe to an instance of int[], and if none of the instances will be modified nor exposed to outside code, it may be useful to regard as equal array instances which C# IEqualityComparer Kullanımı 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 Kullanımı equivalence.