internal static void DisplayWhetherEqual(Food food1, Food food2)
{
if (food1 == food2)
Console.WriteLine(string.Format("{0,12} == {1}", food1, food2));
else
Console.WriteLine(string.Format("{0,12} != {1}", food1, food2));
}
/// <summary>
/// Implements reference types equality (classes)
/// </summary>
internal static void ReferenceTypesEquality()
{
Food apple = new Food("apple", FoodGroup.Fruits);
CookedFood cookedApple = new CookedFood("apple", FoodGroup.Fruits, "stewed");
Food apple2 = new Food("apple", FoodGroup.Fruits);
CookedFood cookedApple2 = new CookedFood("apple", FoodGroup.Fruits, "stewed");
DisplayWhetherEqual(apple, cookedApple);
DisplayWhetherEqual(apple, apple2);
DisplayWhetherEqual(cookedApple, cookedApple2);
}
private static void SortAndShowArray(Food[] array)
{
Array.Sort(array, FoodNameComparer.Instance);
foreach(var item in array)
Console.WriteLine(item.ToString());
}
private static void SortingCustomCollection()
{
Console.WriteLine("First array of food");
Food[] food = new Food[]{
new Food("orange", FoodGroup.Fruits),
new Food("banana", FoodGroup.Vegetables),
new Food("banana", FoodGroup.Fruits) // the same names but in different group -> sorting by multiple fields
};
SortAndShowArray(food);
Console.WriteLine();
Console.WriteLine("Second array - mixed food and cooked food");
// There's no good solution for this sorting problem
Food[] mixedFood = new Food[]{
new Food("apple", FoodGroup.Fruits),
new CookedFood("apple", FoodGroup.Fruits, "baked")
};
SortAndShowArray(mixedFood);
Console.WriteLine();
Console.WriteLine("Third array - mixed food and cooked food - reversed order");
// There's no good solution for this sorting problem
Food[] mixedFoodReversedOrder = new Food[]{
new CookedFood("apple", FoodGroup.Fruits, "baked"),
new Food("apple", FoodGroup.Fruits)
};
SortAndShowArray(mixedFoodReversedOrder);
Console.WriteLine();
}
