fun dummy() {}
Func = type(dummy);
NFunc = type(print); # The function type is not a built-in at the moment,
                     # but we can define it manually.

fun copyList(list: List) {

	list2 = [];

	i = 0;
	while i < count(list): {
		list2[i] = list[i];
		i = i+1;
	}

	return list2;
}

fun numericLess(a: int | float, b: int | float) 
	return a < b;

fun bubbleSort(list: List, less: NFunc | Func = numericLess) {
	
	list2 = copyList(list);

	do {
		swapped = false;

		i = 0;
		while i < count(list2)-1 and not swapped: {
			if less(list2[i+1], list2[i]): {
				swapped = true;
				tmp = list2[i+1];
				list2[i+1] = list2[i];
				list2[i] = tmp;
			}
			i = i + 1;
		}
	} while swapped;

	return list2;
}

unordered_list = [3, 2, 1, 6, -2];
  ordered_list = bubbleSort(unordered_list);

print(ordered_list, '\n'); # [-2, 1, 2, 3, 6]