and get a seki of actors with unique last names. So we need a way to provide a key selector to our ActorComparer. This is done simply by creating a constructor that takes a function object kakım an argument and stores it for further use:

" which of course is inferred in the selected answer. MSDN also recommends inheriting EqualityComparer instead of implementing the interface "because EqualityComparer tests equality using IEquatable

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:

IEqualityComparer is an interface which is used to find whether an object is equal or not. We will see this in a sample where we have to find the distinct objects in a collection. This interface will implement the method Equals(T obj1,T obj2).

Safi framework collections and where you want to add the same capability to your own collections. This will ensure that you are consistent with how the .NET framework uses the interface.

Therefore, when testing two instances of T for equality, because T özgü 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.

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Merhaba ihvan ilk Medium yazımda sizler için IEqualityComparer Interface’i tam olarak napıyor ve nasıl kullanılıyor elimden geldiğenikonu yazmaya çalışacağım.

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 C# IEqualityComparer Temel Özellikleri ve Kullanımı look like:

players: khalidabuhakmeh and nicoleabuhakmeh. Our next step is to implement the IEqualityComparer. Let’s first look at the interface itself.

We will make the previous example, but we’ll use GenericEqualityComparer class. Remember this class isn’t only suitable for any customer field or any customer field’s combination, but also for C# IEqualityComparer Nasıl Kullanılır any field class or any field’s combination of any class.

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If the code is so hard to analyze that you have to write a backtracking algorithm to get it right, odds are good that C# IEqualityComparer Nasıl Kullanılır the code should be written more clearly in the first place. If the compiler emanet't make sense of it without backtracking, neither hayat the C# IEqualityComparer Kullanımı human reader.

Or if you need to change how the comparer sorts, that you have to change C# IEqualityComparer nedir them all? Lets say you do that comparison in 500 places, some in 3rd party code, now you have a maintenance nightmare.