GetHashCode for a class with a list object
c#, gethashcode
Solution
You could do something like:
override int GetHashCode()
{
return Edges.Distinct().Aggregate(0, (x,y) =>x.GetHashCode() ^ y.GetHashCode());
}
It is simple, but should consistent.
Problem
I have such a class: ``` public class Cycle { public List<int> Edges { get; private set; } public override bool Equals(object obj) { Cycle cycle = (Cycle)obj; var list1 = cycle.Edges; var list2 = Edges; var same = list1.Except(list2).Count() == 0 && list2.Except(list1).Count() == 0; return same; } public override int GetHashCode() { // return Edges.GetHashCode(); } } ``` As you can see, if two `Edge` Lists are the same, then I deem the `Cycles` as the same. The issue now is how to implement the `GetHashCode()`? I tried `Edges.GetHashCode()`, but the problem is that two `List<Cycle>`, with the same `Cycle` object but different orders, will be deemed different, even though they should be the same.