Dart & Flutter - Sort an Object List

sort-object-list.dart

// Dart & Flutter - Sort an Object List

class Product {
  String name;
  String category;
  double price;
  Product(this.name, this.category, this.price);

  String asString() {
    return "$name, $category, $price";
  }
}

const List productsList = [
  ["potato", "vegetables", 1],
  ["banana", "fruits", 4.5],
  ["apple", "fruits", 3],
  ["pumpkin", "vegetables", 3.5],
  ["orange", "fruits", 2.5],
];

void main() {
  List<Product> products =
      productsList.map((p) => Product(p[0], p[1], p[2])).toList();

  print("## sorted by price");
  products.sort((a, b) => a.price.compareTo(b.price));
  products.forEach((p) => print(p.asString()));

  print("\n## sorted by price DESC");
  products.sort((b, a) => a.price.compareTo(b.price));
  products.forEach((p) => print(p.asString()));

  print("\n## sorted by name");
  products.sort((a, b) => a.name.compareTo(b.name));
  products.forEach((p) => print(p.asString()));

  print("\n## sorted by category + price");
  products.sort((a, b) {
    int compResult = a.category.compareTo(b.category);
    if (compResult == 0) {
      return a.price.compareTo(b.price);
    }
    return compResult;
  });
  products.forEach((p) => print(p.asString()));
}