Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

Definitive Guide C# IEqualityComparer nerelerde kullanılıyor için

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

The mesele is (and this is why I chose the IList in the first place) that at compile time I don't know the value of T. $endgroup$

Another scenario where it may be useful to have an alternative means of comparison is when an object holds a reference to an instance a mutable type, but will never expose that instance to anything that might mutate it. In general, two instances of int[] that hold the same sequence of values will not be interchangeable, since it would be possible that in future one or both of them might be changed to hold different values.

Bir dahaki sefere yorum yapmış olduğumda kullanılmak üzere adımı, e-posta adresimi ve web kent adresimi bu tarayıcıevet kaydet.

This was a point of some debate and there are arguments on three sides: choose the more specific of the types, choose the more general of the types, or have type inference fail. I will derece rehash the whole argument but suffice to C# IEqualityComparer Nasıl Kullanılır say that the "choose the more general" side won the day.

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 would say that the best use would be when you need to plug in different equality rules for a C# IEqualityComparer nedir certain algorithm. Much in the same way that a sorting algorithm might accept an IComparer, C# IEqualityComparer Nasıl Kullanılır a finding algorithm might accept an IEqualityComparer

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I've tried using LINQ SequenceEqual but again kakım the instances of T are different this returns false;

comparing two objects for values without listing every column See C# IEqualityComparer Temel Özellikleri ve Kullanımı more linked questions Related

However, quite frequently we, C# programmers, use classes and want to get rid of duplicated objects in a collection the same way. Suppose, we do something with actors of a movie:

Finally, if you just need to filter collection for distinct values based on some key and you want to do it quickly with as few additional actions kakım possible, there is a trick that C# IEqualityComparer Kullanımı doesn't require creating new types:

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