rotate method

List<T> rotate(
  1. int n
)

Rotates the list left by n positions (negative = right rotation).

[1,2,3,4,5].rotate(2) // [3,4,5,1,2]

Implementation

List<T> rotate(int n) {
  if (isEmpty) return [];
  final offset = n % length;
  if (offset == 0) return [...this];
  return [...sublist(offset), ...sublist(0, offset)];
}