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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Signum.Utilities.DataStructures
{
public class LambdaComparer<T,S>:IComparer<T>, IEqualityComparer<T>
{
Func<T, S> func;
IComparer<S> comparer = Comparer<S>.Default;
IEqualityComparer<S> equalityComparer= EqualityComparer<S>.Default;
public LambdaComparer(Func<T, S> func)
{
if (func == null)
throw new ArgumentNullException("func");
this.func = func;
}
public int Compare(T x, T y)
{
return comparer.Compare(func(x), func(y));
}
public bool Equals(T x, T y)
{
return equalityComparer.Equals(func(x), func(y));
}
public int GetHashCode(T obj)
{
return equalityComparer.GetHashCode(func(obj));
}
}
}
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I'm Computer Scientist, one of the founders of Signum Software, and the lead developer behind Signum Framework.
www.signumframework.com
I love programming in C#, Linq, Compilers, Algorithms, Functional Programming, Computer Graphics, Maths...