How do I combine two lists in Dart?

Question

I was wondering if there was an easy way to concatenate two lists in dart to create a brand new list object. I couldn\'t find anything and something like this:

My list:

Answer 1

You can use:

var newList = new List.from(list1)..addAll(list2);

If you have several lists you can use:

var newList = [list1, list2, list3].expand((x) => x).toList()

As of Dart 2 you can now use +:

var newList = list1 + list2 + list3;

As of Dart 2.3 you can use the spread operator:

var newList = [...list1, ...list2, ...list3];