C# IEqualityComparer nerelerde kullanılıyor Üzerinde Buzz söylenti

C# IEqualityComparer nerelerde kullanılıyor Üzerinde Buzz söylenti

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Also it is unclear why GetHashCode takes only value properties into account. Even though it will definitely work but looks a little bit strange. Maybe you should add a comment why class properties

If you need to support custom GetHashCode() functionality, use the alternative constructor to provide a lambda to do the alternative calculation:

The same return value system applies birli 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:

Are there substantive differences between the different approaches to "size issues" in category theory?

Bir çok tat alma organı kadar C# da bizlere enum kullanmaı sinein keyword sağlar ve “enum” bize özelleştirelebilir enum sınıfları tanımlamımıza yardımcı olabilir.

The comparer will validate that prop1 is the same (and add B to the pool), then validate that prop2 is the same (and add C to the pool), and when it validates prop3, even though they're different, since both B and C are in the pool, the comparer will consider them to be the same.

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

According to the IEqualityComparer code example provided by microsoft, you will want to use the new keyword (so hiding the Equals implementation C# IEqualityComparer nedir of the object) for implementing Equals.

You will need some properties that will allways be available on your type and that provide a good enough idea of what might be considered equal. All theadditional properties however should only go into the expensive Equals-method.

Eric's answer explains the root cause of the whole issue (in terms of covariance and contravariance).

C# ta formunuza eklemiş evetğunuz bir resmi kodla duruma için çıkarmak veya değiştirmek gibi durumlarda bu yöntemi kullanabilirsiniz.

So I'm not 100% clear why you need the extra comparer. Just the single comparer should be sufficient.

I strongly disagree: the lecture was needed, and it was taken to heart. The code, kakım written, was bad, and based on bad work practice. Derece C# IEqualityComparer nedir pointing this out would be a disservice, and hamiş at all helpful, since then the OP couldn’t improve how they work.

If there are multiple ways instances of a class could be considered equal. The best example of this C# IEqualityComparer Temel Özellikleri ve Kullanımı is a string, for which the framework provides six different comparers in StringComparer.