The Ultimate Guide To C# IEqualityComparer nerelerde kullanılıyor

The Ultimate Guide To C# IEqualityComparer nerelerde kullanılıyor

Blog Article

If you do decide you need a comparer, you gönül certainly use a generalized comparer (see DMenT's answer), but if you need to reuse that logic you should encapsulate it in a dedicated class. You could even declare it by inheriting from the generic base:

ちょっと横道にそれますが、上記サンプルコード（構造体の例など）にちょっと見慣れない形式のコードがいくつか見受けられます。

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:

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: ?

EDIT: As you´ve mentioned ReSharper, I assume as you provide the actual properties to be validated at runtime even R# doesn´t know a good way to implement GetHashCode.

独自の型をコレクションの要素として利用する際には、次のことを考慮して設計しましょう

I now need to do distinct on a collections of some of these objects. I have the following code over and over for each of the child classes:

Fields yaşama be null — appears if there are any nullable fields C# IEqualityComparer nerelerde kullanılıyor or properties in your type. By default, this checkbox is selected, meaning that ReSharper will generate null checks C# IEqualityComparer nedir for selected fields. You yaşama clear this checkbox if you do derece need null checks.

There are many cases where one might want to have a Dictionary locate objects using something other than 100% C# IEqualityComparer Kullanımı equivalence. As a simple example, one may wish to have a dictionary which matches in case-insensitive fashion. One way to accomplish that would be to convert strings to a canonical uppercase form before storing them in the dictionary or performing a lookup. An alternative approach is to supply the dictionary with an IEqualityComparer which will compute hash-codes and check for equality in some sort of case-independent function. There are some circumstances where converting strings to canonical form and using that form whenever possible will be more efficient, but there are others where it's more efficient to only store the string in its original form.

Henüz zait haber için Microsoft Learn’daki “C# 12'bile Neler Yeni” sayfasına ve Roslyn Özellik Durumu sayfasına basar atabilirsiniz. Siz de bu yenilikçi özellikleri C# IEqualityComparer Kullanımı deneyerek mukayyetm ihya deneyiminizi geliştirebilirsiniz.

Umarım bili kırcı bu makale, C# ve .NET vüruttiricilerine rehberlik ederken ilham verici olmuşdolaşma!

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 fail if collections contains a null? however quick experiment on VS C# IEqualityComparer nedir C# Interactive doesn't seem to throw null ref exception!

Her iki öğretici de kullanıcıların C# dilinin temellerini kavramalarını çıkarmak üzere detaylı ve adım kadem örneklerle zenginleştirilmiştir.