Distinct list of lists, where lists contains same values but in different order

Question

I got a list:

var list = new List>();

which could contain

list[0] = {1, 2, 3, 4}
lis         


        

Answer 1

boolean compareLists(list1, list2) {
  // Early rejection
  if (list1.size != list2.size) {
    return false;
  }

  // Sort lists and compare each item
  sorted1 = sort(list1.clone());
  sorted2 = sort(list2.clone());
  for (int i=0; i