static void Main(string[] args)
        {
            MyGenericList <string> collection = new MyGenericList <string>();

            collection.Add("Anna");
            collection.Add("Bertil");
            collection.Add("Cecilia");
            collection.Add("David");
            collection.Add("Academy");
            collection.Add("ITHS");
            collection.Add("Newton");
            collection.Add("Bowers & Wilkins");
            collection.Add("Kvarnskogen");

            // Testing foreach
            foreach (var item in collection)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("-----------------------------------------");

            // Testing for
            for (int i = 0; i < collection.Count; i++)
            {
                Console.WriteLine(collection[i]);
            }
            Console.WriteLine("-----------------------------------------");

            // Testing non deferred version of Where
            var q1 = collection
                     .Where_NonDeferred(s => s.Length <= 5);

            foreach (var item in q1)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("-----------------------------------------");

            // Testing deferred version of Where
            var q2 = collection
                     .Where_Deferred(s => s.Length <= 5);

            foreach (var item in q2)
            {
                Console.WriteLine(item);
            }
            Console.WriteLine("-----------------------------------------");

            // Testing Sum
            var q3 = collection
                     .Sum(new Func <string, int>(ReturnLength /*s => s.Length*/));

            Console.WriteLine($"Total number of characters: {q3}");
            Console.WriteLine("-----------------------------------------");
        }
Ejemplo n.º 2
0
        public static IEnumerable <T> Where_NonDeferred <T>(this IEnumerable <T> collection, MyFunc <T, bool> method)
        {
            MyGenericList <T> tmp = new MyGenericList <T>();

            foreach (var item in collection)
            {
                if (method(item))
                {
                    tmp.Add(item);
                }
            }

            return(tmp);
        }