示例#1
0
        static void Main(string[] args)
        {
            // DELEGATE => pointer to an action/method()

            // ACTION<T>
            // Action => returns nothing, takes 0-16 parameters (in this case a double object)
            // TAKE ONE
            // Pointer to a method ConsoleWrite
            Action <double> print = ConsoleWrite;

            print(2.2);

            // Extension Method taking in Action<T> => sending a pointer to ConsoleWrite Method
            var queueBuffer = new QueueBuffer <double>();

            queueBuffer.DumpActionDelegate <double>(print);

            // TAKE TWO - ANONYMOUS DELEGATE METHOD
            // Where implementation is anonymous and not an actual Method()
            Action <double> printAnon = delegate(double data)
            { Console.Write(data); };

            var queueBuffer2 = new QueueBuffer <double>();

            queueBuffer2.DumpActionDelegate <double>(printAnon);

            // TAKE THREE - LAMBDA EXPRESSIONS
            var queueBuffer3 = new QueueBuffer <double>();

            queueBuffer3.DumpActionDelegate(d => ConsoleWrite(d));

            // Empty Lambda
            Action doNothing = () => { };


            // FUNC<T, K>
            // Func => returns one param, takes 0-16 parameters (in this case a double object)
            // Last param is the return type
            // ie. Func<double, string> takes in double, returns a string
            // TAKE ONE
            // Squere a number
            Func <double, double> square = d => d * d;

            // Add two doubles, return a double
            Func <double, double, double> add = (x, y) => x + y;

            // TAKE FOUR
            // CONVERTER
            // Takes in one type and returns another
            Converter <double, string> converter = d => d.ToString();

            // Using Converter
            var queueBufferConverter = new QueueBuffer <double>();

            Converter <double, DateTime> converterDate = d => new DateTime(2010, 1, 1).AddDays(d);

            queueBufferConverter.AsEnumerableOfExtensionUsingConverter <double, DateTime>(converterDate);

            // TAKE FIVE
            // Adding event handler
            var queueWithEvent = new QueueBuffer <double>();

            // Subscribe to event and specify the method that will fire when event occurs
            queueWithEvent.ItemDiscarded += QueueWithEventOnItemDiscarded;
        }