Esempio n. 1
0
        static MoneyAmount Reserve(MoneyAmount cost)
        {
            decimal factor = 1;

            if (IsHappyHour)
            {
                factor = 0.5M;
            }
            Console.WriteLine("\nReserving an item that cost: {0}.", cost);
            return(cost.Scale(factor));
        }
Esempio n. 2
0
        static void Main(string[] args)
        {
            /*Buy(new MoneyAmount(12, "USD"),
             *  new MoneyAmount(10, "USD"));
             *
             * Buy(new MoneyAmount(7, "USD"),
             *  new MoneyAmount(10, "USD"));
             *
             * IsHappyHour = true;
             * Buy(new MoneyAmount(7, "USD"),
             *  new MoneyAmount(10, "USD"));*/


            /*int x = 2;
             * int y = 4;
             * MoneyAmount x = new MoneyAmount(2, "USD");
             * MoneyAmount y = new MoneyAmount(4, "USD");
             *
             * if (x.Equals(y))
             *  Console.WriteLine("Equal.");
             * if ((x*2).Equals(y))
             *  Console.WriteLine("Equal after scaling.");*/

            /*
             * MoneyAmount x = new MoneyAmount(2, "USD");
             * MoneyAmount y = new MoneyAmount(2, "USD");
             *
             * HashSet<MoneyAmount> set = new HashSet<MoneyAmount>();
             * set.Add(x);
             *
             * if (set.Contains(y))
             *  Console.WriteLine("Cannot add repeated value.");
             * else
             *  set.Add(y);
             *
             * Console.WriteLine("Count = {0}", set.Count);
             */


            MoneyAmount x = new MoneyAmount(2, "USD");
            MoneyAmount y = new MoneyAmount(4, "USD");

            if (x == y)
            {
                Console.WriteLine("Equal.");
            }
            if ((x * 2) == y)
            {
                Console.WriteLine("Equal after scaling.");
            }

            Console.ReadLine();
        }
Esempio n. 3
0
        // Reference types are susceptible to aliasing bugs;
        // By changing contents of an existing object we are risking an aliasing bug to apear;
        // Try to avoid instantiating objects directly;
        // Modification to the constructor requires update in all consumers;
        // Let objects of the class construct subsequent objects;
        private static MoneyAmount Reserve(MoneyAmount cost)
        {
            decimal factor  = 1;
            var     newCost = cost;

            if (IsHappyHour)
            {
                // Create new object when content should change;
                factor = .5M;
            }

            Console.WriteLine($"\nReserving an item that costs {cost}");
            return(cost.Scale(factor));
        }
Esempio n. 4
0
        private static void Buy(MoneyAmount wallet, MoneyAmount cost)
        {
            var enoughMoney = wallet.Amount >= cost.Amount;

            var finalCost = Reserve(cost);

            var finalEnough = wallet.Amount >= finalCost.Amount;

            if (enoughMoney && finalEnough)
            {
                Console.WriteLine($"You will pay {cost} with your {wallet}.");
            }
            else if (finalEnough)
            {
                Console.WriteLine($"This time, {wallet} will be enough to pay {finalCost}");
            }
            else
            {
                Console.WriteLine($"You cannot pay {cost} with your {wallet}.");
            }
        }
Esempio n. 5
0
        static void Buy(MoneyAmount wallet, MoneyAmount cost)
        {
            bool enoughMoney = wallet.Amount >= cost.Amount;

            MoneyAmount finalCost = Reserve(cost);

            bool finalEnough = wallet.Amount >= finalCost.Amount;

            if (enoughMoney && finalEnough)
            {
                Console.WriteLine("You will pay {0} with your {1}", cost, wallet);
            }
            else if (finalEnough)
            {
                Console.WriteLine("This time, {0} will be enough to pay {1}", wallet, finalCost);
            }
            else
            {
                Console.WriteLine("You cannot pay {0} with your {1}", cost, wallet);
            }
        }
Esempio n. 6
0
        private static void Main()
        {
            //Buy(
            //    new MoneyAmount(100, "USD"),
            //    new MoneyAmount(70, "USD")
            //);

            //IsHappyHour = true;
            //Buy(
            //    new MoneyAmount(100, "USD"),
            //    new MoneyAmount(120, "USD")
            //);

            var x = new MoneyAmount(5, "USD");
            var y = new MoneyAmount(5, "USD");

            if (x == y)
            {
                Console.WriteLine("Equal.");
            }
            if ((x * 2) == y)
            {
                Console.WriteLine("Equal after scaling.");
            }

            //var x = 2;
            //var y = 2;

            //var set = new HashSet<MoneyAmount>();

            //set.Add(x);

            //if (set.Contains(y))
            //    Console.WriteLine("Cannot add repeated value.");
            //else
            //    set.Add(y);


            //Console.WriteLine($"Count = {set.Count}");
        }