mini-max-sum in Dart

main.dart

String minMax(String s) {
  int sumA, min4, max4;
  List<int> l;
  try {
    l = s.split(' ').map((String s) => int.parse(s)).toList();
    if (l.length != 5 || l.any((e) => e < 1 || e > 1000000000))
      throw 'Five integers in 1..10^9 range expected!';
  } catch (e) {
    throw 'Input error: $e';
  }

  sumA = l.fold(0, (s, e) => (s + e));
  max4 = l.fold(0, (s, e) => sumA - e > s ? sumA - e : s);
  min4 = l.fold(sumA, (s, e) => sumA - e < s ? sumA - e : s);
  return '$min4 $max4';
}

// https://www.hackerrank.com/challenges/mini-max-sum/problem
// do test it. Note Args/args for arguments passing.
  void main(List<String> Args) { // unused on DartPad => make args below
  List<String> args = ['1', '2', '3', '4', '5',]; // for DartPad sharing
  if (args.isEmpty) {
    print('Gimme FIVE ints, please!');
    return;
  }
  String s = args.join(' ');
  try {
    print(minMax(s) + ' from $s.');
  } catch (e) {
    print('$e [input: $s]');
  }
}