filter_by_year_and_month.dart

class Noticia {
  String title;
  DateTime createdAt;
  
  Noticia(this.title, this.createdAt);
}

void main() {
  List<Noticia> registers = [
    Noticia("Primeira postagem", DateTime(2022,07,01)),
    Noticia("Segunda postagem", DateTime(2022,11,01)),
  ];
  
  Iterable<Noticia> esteAno = registers.where((Noticia item) {
    return item.createdAt.year == DateTime.now().year;
  });
  
  Iterable<Noticia> esteMes = registers.where((Noticia item) {
    return item.createdAt.year == DateTime.now().year && item.createdAt.month == DateTime.now().month;
  });

  print(esteMes.first.title);
}