En C# IEqualityComparer nerelerde kullanılıyor Sırları

En C# IEqualityComparer nerelerde kullanılıyor Sırları

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IEqualityComparer is a generic .Safi interface that allows implementing customized equality comparison for collections.

ReSharper provides the Generate equality comparer command to automate generation of the comparer class.

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:

Hash functions that are used to generate hash codes, actually do one thing: they project elements from some veri takım to a smaller data seki (the set of hash codes). The former might be almost anything, while the latter is usually the kaş of integers.

Implementations are required to ensure that if the Equals(T, T) method returns true for two objects x and y, then the value returned by the GetHashCode(T) method for x must equal the value returned for y.

This cannot detect that a new property was added, and that this property differs in C# IEqualityComparer Kullanımı the two objects.

public string FirstName get; kaş; public string LastName get; grup; public string Address takım; get;

$begingroup$ I have made some modifications, C# IEqualityComparer Temel Özellikleri ve Kullanımı and am curious kakım to what the best strategy for showing them would be? replace the original codeblock, or add underneath? $endgroup$

Coming soon: C# IEqualityComparer Kullanımı Throughout 2024 we will be phasing out GitHub Issues as the feedback mechanism for content and replacing it with a new feedback system. For more information see: .

Contravariance enables use to use a less derived type than that specified by the generic parameter. In our case, we could pass in an object instance instead of a Player instance.

If there are no fields/properties in your type or you do not select any of them, ReSharper, depending on your settings, throws new NotImplementedException(), returns default value, or puts code that will not compile in the body C# IEqualityComparer Kullanımı of the generated methods. You güç configure the settings on the Code Editing

According to this thinking, both types should implement IEquatable, because it doesn't seem likely that there are other meaningful ways of doing an equality sınav.

However, choosing the more specific type Giraffe: return value dirilik implicitly be cast to a larger type Animal if needed; and a return type of IEnumerable implicitly casts to IEnumerable. And that's the most used variant interface. I wonder why the C# IEqualityComparer Kullanımı more general type was chosen?

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