Provides an equality check when there is only one way of comparing the objects (implemented inside the class)
If you want a generic solution that creates an IEqualityComparer for your class based on a property (which acts as a key) of that class have a look at this:
If either Player instance is null, then we cannot compare the two usernames. The two players cannot be equal.
Gine ilk yöntemde yaptığımız resmin konumlandırılması teamüllemini SizeMode özelliğini kullanarak kodla yapabilirsiniz.
This interface allows the implementation of customized equality comparison for collections. That is, you kişi create your own definition of equality, and specify that this definition be used with a collection type that accepts the IEqualityComparer interface.
This is because LINQ methods accept IEnumerable birli a parameter. Consequently, they have no concept of the implementation of the original list.
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Going with your example, say that you wanted to compare the objects ignoring case, so that C# IEqualityComparer Temel Özellikleri ve Kullanımı "Apple" and "apple" would be considered the same object. Then your ProductComparer may look like:
This C# IEqualityComparer Temel Özellikleri ve Kullanımı interface, also added in 2.0, allows you to pass custom object equality checking to a Hashtable, Dictionary and NameValueCollection. You pass in your custom comparison implementation much like you do with IComparer and the Hashtable will use this for equality checks.
Eğitimde, Microsoft'tan Jerry Nixon ile Crank211'in müessis orantığı Daren May üzere sahaında spesiyalist iki isim, C# hakkındaki bilgilerini paylaşır. Uzmanlar, kursun her kademında öğrencilere ameliye örnekler sunarak C# dilini elan anlaşılır kılmaya gayret değer.
The flexibility that this solution offers might be useful when one deals with the movie's sequel. The problem is that Julia Roberts plays two roles there: Tess Ocean and herself:
1 shouldn't this işleyen if collections contains a null? however quick experiment on VS C# Interactive doesn't seem to throw null ref exception!
By 'internalization', you want the comparison logics to be an inherent part of the class - after C# IEqualityComparer Temel Özellikleri ve Kullanımı all, each derived class will have the comparison logics by default! So chances are that you want to tweak your sistem a bit? yes? no?