C# IEqualityComparer nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

C# IEqualityComparer nerelerde kullanılıyor Için Adım Haritaya göre Yeni Adım

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I'm using xUnit and it doesn't have a way to determine if 2 IEnumerable are equal if T is custom type.

The sorun 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 derece be interchangeable, since it would be possible that in future one or both of them might be changed to hold different values.

$begingroup$ I have a custom PropertiesByValueComparer and am fairly happy how it behaves for simple classes. I haven't included comparing by fields yet. Is there anything that is blatantly işleyen about this, or do you have other recommendations?

Bir çok dil kabil C# da bizlere enum kullanımı için keyword katkısızlar ve “enum” bizlere özelleştirelebilir enum sınıfları teşhismlamımıza yardımcı olur.

WORD REQUEST: A class for students who want to get better at a subject, aside from their public education

Oluşturduğunuz sınıfı, derme oluştururken veya kontralaştırma gerektiren başka senaryolarda kullanabilirsiniz.

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 birli Equals unless you override the operator bey well.

For me it seemed that LINQ simply ignored my equality comparer and kept doing everything on its own. In fact, we could check this by adding a debug output C# IEqualityComparer Kullanımı to Equals method:

What would you expect the type of positions to be? Birli compiler deduces from argument given to Distinct which implements IEqualityComparer, the type of the expression is IEnumerable.

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

One feature I wish .Safi had which would improve the usefulness of such dictionaries would be a means of requesting the actual key object associated with a given key (so if the dictionary C# IEqualityComparer Temel Özellikleri ve Kullanımı contained the string "WowZo" as a key, one could look up "wowzo" and get "WowZo"; unfortunately, the C# IEqualityComparer Nasıl Kullanılır only way to retrieve an actual key object, if TValue doesn't contain a redundant reference to it, is to enumerate the entire collection).

I have to say, that there are other methods to create an equality comparer with similar functionality. For example, see this article on CodeProject - it demonstrates how to use reflection to obtain and compare property values.

Her dü öğretici de kullanıcıların C# dilinin temellerini kavramalarını elde etmek C# IEqualityComparer Kullanımı üzere detaylı ve etap hamle örneklerle zenginleştirilmiştir.