Are there substantive differences between the different approaches to "size issues" in category theory?
This transformation allows for faster comparison of elements during look-up, because the elements of the second kaş are easier to compare and because there are fewer of them. Still, due to this same reason any hash function might eventually produce equal codes for non equal objects
That means that your BaseClassComparer constrains the result type to base class and the conversion at the assignment is derece possible.
next, when we iterate over the query object it gets hash code for each item in the source collection and compares it with the hashes of preceding objects
Notice that I didn't have to override Equals, GetHashCode in neither of the classes. I kişi use this comparer in any object that implements ICustom without having to rewrite the comparison logic.
Well, your implementation is pending. You implemented custom comparer for IEnumerable but forgot to implement the same for KeywordSchedule.
C# ile yazılım vüruttirirken, nesneleri özümleme eden sınıflar oluşturursunuz. Örneğin, bir otomobili temsil fail bir “Makine” derslikı oluşturabilirsiniz. Bu sınıflardan nesneler oluşturarak yetişekınızın temel yapı taşlarını kurma edersiniz.
I'm looking for real world best practices, how other people might have implemented solutions with complex domains.
More importantly, I have stepped into the trap of thinking that objects, which I use in my code, emanet be only partially relevant to me, while in case we do OOP every object must be considered in its entirety (things like SOLID help us with that.) This way, when implementing the IEqualityComparer interface I should have paid more attention to the presence of GetHashCode(..) method. This would solve my sorun at once, because it is this same method that LINQ uses when asked to extract distinct objects and perform other equality related operations (see Kaş operators in this article). To verify this we add a debug message to the method and observe several calls to it:
I'm using this in an integration sınav, so I insert data from a IEnumerable into a DB at the start, then call my SUT to retrieve C# IEqualityComparer nerelerde kullanılıyor data from DB and compare.
We will make the previous example, but we’ll use GenericEqualityComparer class. Remember this class isn’t only suitable for any customer field or any customer field’s combination, but also for any field class or any field’s combination of any C# IEqualityComparer Kullanımı class.
So there you go. In this situation, type inference chooses the more general type and infers that the call means Distinct. Type inference never takes the return type
And yes, after this C# IEqualityComparer Temel Özellikleri ve Kullanımı the output of the program doesn't change at all. So, what the hell is LINQ doing and why doesn't it even try to use the equality comparer that we have provided? The situation C# IEqualityComparer Nasıl Kullanılır was even bitter for me because I was trying to use Distinct() combined with custom equality comparer to prepare veri for pushing to data base, so I ended up with SQL Server telling me that I am breaking a primary key constraint. Because of being focused on a broader sorun I didn't take time to think over the stuff that I was trying to use. What I missed was the fact that LINQ, being a query engine, tries to perform bey efficiently as possible.
Doing that you changed the behavior for a single class, C# IEqualityComparer nedir what if you need the same logic for other classes? If you need a "generic comparison". That is why you have IEqualityComparer.