Delete duplicates in a List of int arrays

Question

having a List of int arrays like:

List intArrList = new List();
intArrList.Add(new int[3] { 0, 0, 0 });
intArrList.Add(new int[5] {         


        

Answer 1

Input list;

List> initList = new List>();
initList.Add(new List{ 0, 0, 0 });
initList.Add(new List{ 20, 30, 10, 4, 6 });  //this
initList.Add(new List { 1, 2, 5 });
initList.Add(new List { 20, 30, 10, 4, 6 });  //this
initList.Add(new List { 12, 22, 54 });
initList.Add(new List { 1, 2, 6, 7, 8 });
initList.Add(new List { 0, 0, 0, 0 });

You can create a result list, and before adding elements you can check if it is already added. I simply compared the list counts and used p.Except(item).Any() call to check if the list contains that element or not.

List> returnList = new List>();

foreach (var item in initList)
{
    if (returnList.Where(p => !p.Except(item).Any() && !item.Except(p).Any()
                             && p.Count() == item.Count() ).Count() == 0)
    returnList.Add(item);
}