void main() { List<List<int>> nestedList = [[1, 2], [3, 4, 5], [6], [7, 8, 9]]; List<int> flattenedList = nestedList.expand((list) => list).toList(); print(flattenedList); // Output: [1, 2, 3, 4, 5, 6, 7, 8, 9] }
void main() { List<List<int>> nestedList = [[1, 2], [3, 4, 5], [6], [7, 8, 9]]; List<int> flattenedList = nestedList.expand((list) => list).toList(); print(flattenedList); // Output: [1, 2, 3, 4, 5, 6, 7, 8, 9] }