IEqualityComparer is a generic .NET interface that allows implementing customized equality comparison for collections.
Sert çok programlama dili ile teknolojisine geniş perspektiften yaklaşarak, yeni kafalayanlardan profesyonellere derece her seviyeden bireye şayeste muhtevaeriklerle donatılmıştır.
The same return value system applies as 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:
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Implementations are required to ensure that if the Equals(T, T) method returns true for two objects x and y, then the value returned by the GetHashCode(T) method for x must equal the value returned for y.
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You could possibly create a GenericComparer with a generic parameter which is constrained to be at least of base class which might get you closer to what you are trying to do. This would look like
I've assumed that you want to select ItemWrapper - it's hard to tell without seeing the C# IEqualityComparer nedir types involved, but that looks likely to be what you want.
If it is possible, birey we add an attribute to a property to say that this property is hamiş relevant in the comparison?
comparing two objects for values without listing every column See more linked questions Related
Good news is that this same Distinct() method works for collections of our custom objects too. So if George Clooney accidentally creeps into our collection twice that's not a mesele:
And yes, after this the output of the izlence doesn't change at all. So, what the hell is LINQ doing and why doesn't it even C# IEqualityComparer Temel Özellikleri ve Kullanımı try to use the equality comparer that we have provided? The situation was even bitter for me because I was trying to use Distinct() combined with custom C# IEqualityComparer nerelerde kullanılıyor equality comparer to prepare veri for pushing to veri base, so I ended up with SQL Server telling me C# IEqualityComparer nedir that I am breaking a primary key constraint. Because of being focused on a broader sıkıntı I didn't take time to think over the stuff that I was trying to use. What I missed was the C# IEqualityComparer Temel Özellikleri ve Kullanımı fact that LINQ, being a query engine, tries to perform birli efficiently birli possible.
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