If two objects compare kakım equal, the GetHashCode method for each object must return the same value. However, if two objects do derece compare as equal, the GetHashCode methods for the two object do derece have to return different values.
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. The best example of this is arrays, which with .Safi 4 now implement the IStructuralEquatable interface. This makes it possible to distinguish whether you are comparing two arrays for reference equality, or for "structural equality" - whether they have the same number of items with the same values in each position. Here's an example:
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As an example, it might make sense for two different instances of an Employee class to be considered equal if they both represent the same entity in your system.
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IStructuralEquatable is quite new and unknown, but I read somewhere that it C# IStructuralEquatable Nasıl kullanılır dirilik be used to compare the contents of collections and arrays. Am I wrong, or is my .Net wrong?
This is very disappointing behaviour from Microsoft; I'm now wondering if I should review the list of cases I've filed and see if other ones I've submitted have been removed...
Reading through the excellent blog post by Sergey on struct equality performance he mentions that the default implementations are pretty slow and using boxing for each member. Additionally, he mentions that a memory comparison may hamiş give you the correct results in this super simple example:
In Xamarin.Essentials we use the C# struct all over the place to encapsulate "small groups of related variables" for our event handlers. They are groups of veri that don't need to be created by the developers consuming the data and are only really used for reading the data.
Kupkuru on a certain ortam, I'm compelled to issue the standard warning hamiş to rely on the values of hashcodes or how they are computed, since it is hamiş guaranteed to be the same across updates or platforms.
Defines methods to support the comparison of objects for structural equality. Structural equality means that two objects are equal because they have equal values.
The IStructuralEquatable interface supports only custom comparisons for structural equality. The IStructuralComparable interface supports custom structural comparisons for sorting and ordering.
Fantasy TV series with a male protagonist who uses a bow and arrows and başmaklık a hawk/falcon/eagle type bird companion