//
private static void SampleEqualityComparer()
{
var list = new HashSet <FoodItem>(FoodItemEqualityComparer.Instance());
list.Add(new FoodItem("banana", FoodType.Fruit));
list.Add(new FoodItem("baNanA", FoodType.Fruit));
list.Add(new FoodItem("orange", FoodType.Fruit));
list.Add(new FoodItem("Apple", FoodType.Fruit));
list.Add(new FoodItem("apple", FoodType.Fruit));
list.Add(new FoodItem("banana", FoodType.Fruit));
list.Add(new FoodItem("pear", FoodType.Fruit));
foreach (var item in list)
{
Console.WriteLine(item);
}
Console.WriteLine();
var list2 = new HashSet <FoodItem>(EqualityComparer <FoodItem> .Default);
list2.Add(new FoodItem("banana", FoodType.Fruit));
list2.Add(new FoodItem("baNanA", FoodType.Fruit));
list2.Add(new FoodItem("orange", FoodType.Fruit));
list2.Add(new FoodItem("Apple", FoodType.Fruit));
list2.Add(new FoodItem("apple", FoodType.Fruit));
list2.Add(new FoodItem("banana", FoodType.Fruit));
list2.Add(new FoodItem("pear", FoodType.Fruit));
foreach (var item in list2)
{
Console.WriteLine(item);
}
}
private static void TestStandartHash()
{
FoodItem beetroot = new FoodItem("beetroot", FoodType.Vegetables);
FoodItem pickledBeetroot = new FoodItem("beetroot", FoodType.Sweets);
var eqComparer = FoodItemEqualityComparer.Instance();
bool equals = eqComparer.Equals(beetroot, pickledBeetroot);
Console.WriteLine("Equals? " + equals.ToString());
Console.WriteLine(eqComparer.GetHashCode(beetroot));
Console.WriteLine(eqComparer.GetHashCode(pickledBeetroot));
}
