lastNWords method

@useResult String lastNWords(int n)

Implementation

@useResult
String lastNWords(int n) {
  if (n <= 0) return '';
  final List<String> words = trim().split(RegExp(r'\s+'));
  if (words.length <= n) return words.join(' ');
  return words.sublist(words.length - n).join(' ');
}