Remove everything which is duplicate in a List

Question

Hi I hope you can help me out on this one. I have a List > and I want to remove everything which is duplicate in such list. That is: 1) Within the List there are some of the double[] which are duplicate.I want to keep only the non-duplicate doubles[] within the List . 2) Within List > there are some of the List which are duplicate. I want to keep only the non-repeated lists. I have tried the following but it doesn't work. public static List > CleanListOfListsOfDoubleArray(List > input) { var output = new List >(); for (int i = 0; i { var temp= input[i].Distinct().ToList(); output.Add(temp); } return output.Distinct().ToList(); } Any suggestions? Many thanks!!!

HappyCode HappyCode · Answer

Problem solved!! public class ArrayComparer : IEqualityComparer { public bool Equals(T[] x T[] y) { return ReferenceEquals(x y) || (x != null && y != null && x.SequenceEqual(y)); } public int GetHashCode(T[] obj) { return 0; } } public class ListOfArrayComparer : IEqualityComparer > { public bool Equals(List x List y) { return ReferenceEquals(x y) || (x != null && y != null && x.SequenceEqual(y new ArrayComparer ())); } public int GetHashCode(List obj) { return 0; } } The code should then look like this: public static List > CleanListOfListsOfDoubleArray(List > input) { var output = new List >(); for (int i = 0; i { var temp = input[i].Distinct(new ArrayComparer ()).ToList(); output.Add(temp); } return output.Distinct(new ListOfArrayComparer ()).ToList(); } Or even just: public static List > CleanListOfListsOfDoubleArray(List > input) { var output = input.Select(t => t.Distinct(new ArrayComparer ()).ToList()).ToList(); return output.Distinct(new ListOfArrayComparer ()).ToList(); }

Remove everything which is duplicate in a List<List<double[]