In .NET System.Object.GetHashCode method is used in a lot of places, throughout the .NET base class libraries. Especially when finding items in a collection fast or to determine equality. Is there a ...
How does the default implementation for GetHashCode() work? And does it handle structures, classes, arrays, etc. efficiently and well enough? I am trying to decide in what cases I should pack my own ...
From ValueType.cs **Action: Our algorithm for returning the hashcode is a little bit complex. We look ** for the first non-static field and get it's hashcode. If the type has no ** ...
I'm just curious because I guess it will have impact on performance. Does it consider the full string? If yes, it will be slow on long string. If it only consider part of the string, it will have bad ...
Is there a way of getting a unique identifier of an instance? GetHashCode() is the same for the two references pointing to the same instance. However, two different instances can (quite easily) get t...
To quote from Guidelines and rules for GetHashCode by Eric Lippert: Rule: Consumers of GetHashCode cannot rely upon it being stable over time or across appdomains Suppose you have a Custome...
EnumerableObject : IEnumerable<Foo> wraps a List<Foo> If EnumerableObject a.SequenceEquals( EnumerableObject b), then they are equal. Therefore, a GetHashCode must be implemented. The p...
I'm working with a domain model and was thinking about the various ways that we have to implement this two methods in .NET. What is your preferred strategy? This is my current implementation: pu...
I'm trying to understand the role of the GetHashCode method of the interface IEqualityComparer. The following example is taken from MSDN: using System; using System.Collections.Generic; class Exampl...
The VS2005 documentation Guidelines for Overloading Equals() and Operator == (C# Programming Guide) states in part Overriding operator == in non-immutable types is not recommended. The newer .NE...