How I make a unique list without any duplication value using RxList in Dart or Flutter?

Question

How do I make a unique list without any duplication value using RxList in Dart or Flutter?

My expectation:

RxList<String> myList = ["Canada", "India", "Canada"];

print(myList); 
// My expectation: ["Canada", "India"];

Answer 1

I found two best way to filter duplication.

First one:
RxList<String> myList = ["Canada", "India", "Canada"].obs;
print(myList.value.toSet().toList()); // ["Canada", "India"]

Second one:
if(!myList.contain(value)){
myList.add(value);
}