En iyi Tarafı C# IEqualityComparer Nasıl Kullanılır

En iyi Tarafı C# IEqualityComparer Nasıl Kullanılır

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Tamam, enumları tanımladık, bileğerat ekledik ve bu bileğerleri dijital yahut numerik sıfır tipler ile eşleştirdik.Ancak bu değefrat ne vukuf geliyor. Birisi bana yardımcı olur mi ?

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 bey well

1 Foo should be immutable if you intend to use it bey key in hash tables. An in that case new properties needs to be grup using the ctor's paramsters, and anyone doing so would see that your sınav for the Comparer no longer compiles.

I've added to my class the IEqualityComparer implementation, derece sure if the code bellow is the correct one, especially the Equals(object x, object y) functions: should we override or make a new implementation of the Equals method, like this: ?

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.

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

It is essentially the same for this purpose with one subtle difference. In your first example you override C# IEqualityComparer nedir Equals using a parameter of type Object and then have to cast it to Customer, however, in your second example you are able to have the parameter of type Customer which means there is no need to C# IEqualityComparer nedir cast.

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

 

Örnekte, kullanıcıların yeksan olup olmadığını muayene ederken kullanıcı adları dikkate alınmıştır.

It looks like the generic version of this interface performs the same function but is used for Dictionary) collections.

I have to say, that there are other methods to create an equality comparer with similar functionality. For example, see this C# IEqualityComparer Nasıl Kullanılır article on CodeProject - it demonstrates how to use reflection to obtain and compare property values.

Her dü öğretici de kullanıcıların C# dilinin temellerini kavramalarını kurmak üzere detaylı ve girişim kadem örneklerle zenginleştirilmiştir.