void Start( )
{
// create calculation objects that get chained to each other in a sec
Chain calc1 = new AddNumbers();
Chain calc2 = new SubstractNumbers();
Chain calc3 = new DivideNumbers();
Chain calc4 = new MultiplyNumbers();
// now chain them to each other
calc1.SetNextChain(calc2);
calc2.SetNextChain(calc3);
calc3.SetNextChain(calc4);
// this is the request that will be passed to a chain object to let them figure out which calculation objects it the right for the request
// the request is here the CalculationType enum we add. so we want this pair of numbers to be added
Numbers myNumbers = new Numbers(3, 5, CalculationType.Add);
calc1.Calculate(myNumbers);
// another example:
Numbers myOtherNumbers = new Numbers(6, 2, CalculationType.Multiply);
calc1.Calculate(myOtherNumbers);
// or pass it to some chain object inbetween which will not work in this case:
Numbers myLastNumbers = new Numbers(12, 3, CalculationType.Substract);
calc3.Calculate(myLastNumbers);
}
static void Main(string[] args)
{
//NO LAMBDA- no anonomus method- NAMED method
int Sum(int x, int y)
{
return(x + y);
}
//przypisanie- dwie metody do wywołania
//MyDelegate d = new MyDelegate(Sum);
MyDelegate deletaTeSum = Sum;
int result1 = deletaTeSum.Invoke(12, 15);
Console.WriteLine("result 1: " + result1);
int result2 = deletaTeSum(12, 15);
Console.WriteLine("result 2: " + result2);
void Execute()
{
//NO LAMBDA- anonomous method
MultiplyNumbers multiply = delegate(int number1, int number2)
{
return(number1 * number2);
};
//wykonanie
Console.WriteLine("Anonomous method result- Execute: " + multiply(4, 3) + " " + multiply(4, 3).GetType());
}
Execute();
//delegate, anonymous method using lambda, dynamic invoke (slow)
MyIntAndString lambda = (int a, string b) => { Console.WriteLine("ELO: " + a + b); };
//parameter is array of objects
lambda.DynamicInvoke(new object[] { 123, "four five six" });
//LAMBDA DELEGATES
// => GOES TO
CombineTwoInts adder = (a, b) => { return(a + b); };
Console.WriteLine("lambda delegate: " + adder(3, 5));
//LAMBDA DELEGATE
CombineTwoInts multiplier = (int a, int b) => { return(a * b); };
Console.WriteLine("lambda delegate2: " + multiplier(3, 5));
//LAMBDA PREDICATE
var greaterThan3 = new List <int> {
1, 2, 3, 4, 5, 6
}.Where(x => x > 3);
foreach (int i in greaterThan3)
{
Console.Write("Lambda in anonomoush method: " + i + ", ");
}
//Mosh lambda DELEGATE
Func <int, int> square = number => number * number;
Console.WriteLine(square(5));
Console.ReadKey();
}
