Records: unboxing & Fibonacci example

records_fibonacci.dart

void main() {
  var result = <int>[];
  for (var (int x,int y) = (0,1); y < 100; (x+=y,y+=x)){
    result.add(x);
    result.add(y);
  }
  print (result);
}

records_unboxing.dart

// Method returning a Record of int and String
(int, String) calculateResult() => (10, "comment");

void main() {
  // Standard unboxing
  final result = calculateResult();
  print ('result.\$1 : ${result.$1}');
  print ('result.\$2 : ${result.$2}');
 
  
  // Unboxing to variables
  final (value, comment) = calculateResult();
  print ('value: $value');
  print ('comment: $comment');
}