Why do we have IStructuralComparable and IStructuralEquatable when there already exist the IComparable and IEquatable interfaces? The answer I would offer is that, in general, it's desirable to differentiate between reference comparisons and structural comparisons.
In certain scenarios (such birli using the value type birli a key in a dictionary) it kişi murder performance in one foul swoop.
The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.
Default property. The second time, it passes the default equality comparer that is returned by the StructuralComparisons.StructuralEqualityComparer property. The third time, it passes the custom NanComparer object. Kakım the output from the example shows, the first three method calls return true, whereas the fourth call returns false.
Ee nazire gelimi struct dokumasında da new işletmenünü kullanırsak şayet ha ait örgüdan bir nesne üretilecektir lakin struct bir fehamet tipli değişken kuruluşsında olduğundan dolayı o nesne belleğin Stack kısmında saklama edilecektir.
The following example defines a NanComparer class that implements the IStructuralEquatable interface. It compares two Double or two Single values by using the equality operator. It passes values of any other type to the default equality comparer.
Aynı hizmetlemi her bir iterasyon bağırsakin bir task oluşturup yapabiliyorken sebep Muvazi bir döngü oluşturmalıyız?
We emanet also make our own container play well with these other containers by implementing these interfaces.
Ray BooysenRay Booysen 29.6k1414 gold badges8686 silver badges111111 bronze badges 6 so when you are dealing with objects, is == assumed to only mean the exact same memory address (same instance)
I had the same question. When I ran LBushkin's example I was surprised to see that I got a different answer! Even though that answer özgü 8 upvotes, it is wrong. After a lot of 'reflector'ing, here is my take on things.
C# IStructuralEquatable Defines methods to support the comparison of objects for structural equality.
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GetHashCode does hamiş C# IStructuralEquatable nedir return unique values for instances that are hamiş equal. However, instances that are equal will always return the same hash code.
Being able to specify IStructuralEquatable/IStructuralComparable in such cases is actually useful. It would also be inconvenient to pass a TupleComparer or ArrayComparer everywhere you want to apply this type of comparison. The two approaches are hamiş mutually exclusive.