C# IEqualityComparer Temel Özellikleri ve Kullanımı Herkes İçin Eğlenceli Olabilir

C# IEqualityComparer Temel Özellikleri ve Kullanımı Herkes İçin Eğlenceli Olabilir

Blog Article

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

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

If you're derece assigning to anything, you'll need to. Distinct() returns an IEnumerable rather than doing an in place update

 

IEqualityComparer is an interface for an object that performs the comparison on two objects of the type T.

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.

退出登录 注册 登录 五维思考 学习要加，骄傲要减，机会要乘，懒惰要除。

When you override Equals and GetHashCode you are changing the way the object will determine if it is equals to another. And a note, if you compare objects using == operator it will hamiş have the same behavior bey Equals unless you override C# IEqualityComparer Temel Özellikleri ve Kullanımı the operator kakım well.

Collaborate with us on GitHub The source for this content emanet be found on GitHub, where you sevimli also create and review issues and pull requests. For more information, see our contributor guide.

This interface, also added in 2.0, allows C# IEqualityComparer nerelerde kullanılıyor you to pass custom object equality checking to a Hashtable, Dictionary and NameValueCollection. You pass in your custom C# IEqualityComparer Nasıl Kullanılır comparison implementation much like you do with IComparer and the Hashtable will C# IEqualityComparer nerelerde kullanılıyor use this for equality checks.

1 @Boiethios Then you might introduce some dirty-flag C# IEqualityComparer nerelerde kullanılıyor that determinaes if your object was modified istead of constantly checking all properties if they are still same kakım what you have in the database.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.

IEqualityComparer kullanarak, özel gereksinimlere yakışır done işleme stratejileri vüruttirebilir ve pratik genelinde tutarlılık sağlayabilirsiniz.

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