static void UsingFunc()
{
List <Product> productList = new List <Product>();
DataDisplay display = new DataDisplay();
productList.Add(new Product("Iphone 11", 11000));
productList.Add(new Product("TV LG 70'", 7000));
productList.Add(new Product("PS5", 2500));
Func <Product, string> delegateFunc = product => product.ProductName.ToUpper();
List <string> nameList = productList.Select(delegateFunc).ToList();
display.Display(nameList);
}
static void UsingFilter()
{
DataDisplay display = new DataDisplay();
Filter filter = new Filter();
List <Product> ProductList = new List <Product>();
ProductList.Add(new Product("Iphone 11", 11000));
ProductList.Add(new Product("TV LG 70'", 7000));
ProductList.Add(new Product("PS5", 2500));
Console.WriteLine("Option the filters: [1] Filter by name [2] Filter by price [3] Cash payment [4] Remove product per value");
int option = int.Parse(Console.ReadLine());
if (option == 1)
{
ProductList.Sort(filter.FilterName);
}
else if (option == 2)
{
ProductList.Sort(filter.FilterPrice);
}
else if (option == 3)
{
DiscountService discount = new DiscountService();
ProductList.ForEach(discount.disc);
}
else if (option == 4)
{
Console.Write("Waht value: ");
double value = double.Parse(Console.ReadLine());
//Predicate é um delegate que retorna um bool.
Predicate <Product> removeItemPerValue = (prod) => prod.Price >= value;
ProductList.RemoveAll(removeItemPerValue);
}
else
{
Console.WriteLine("Invalid option!");
}
display.Display(ProductList);
}