static void Main(string[] args)
{
SimonVdMeer svdm = new SimonVdMeer();
WillemKlein wk = new WillemKlein();
//wk.Reken(svdm.Add, 3,4);
//wk.Reken(svdm.Subtract, 8, 7);
// Multicast delegate
MathDel m1 = svdm.Add;
m1 += svdm.Subtract;
m1 += Multiply;
m1 += svdm.Subtract;
foreach (var met in m1.GetInvocationList())
{
Console.WriteLine(met.Method.Name);
}
int res = m1(1, 2);
Console.WriteLine(res);
}
public void Reken(MathDel berekening, int a, int b)
{
Console.WriteLine("Willem Klein rekent nu...");
int result = berekening(a, b);
// TODO: Rekenen
Console.WriteLine($"Het resultaat is: {result}");
}
public void Calculate(MathDel bliep, int a, int b)
{
Console.WriteLine("Willem gaat rekenen...");
var result = bliep.Invoke(a, b);
Console.WriteLine(result);
}
static void Main(string[] args)
{
int res = Add(1, 2);
// .NET 1.0/1.1 (2002/2003)
MathDel m1 = new MathDel(Add);
res = m1(2, 3);
// .NET 2.0
MathDel m2 = Add;
res = m2(3, 4);
int c = 100;
MathDel m3 = delegate(int a, int b)
{
return(a + b + c);
};
res = m3(4, 5);
// .NET 3.0 (2007)
// Lambda's
MathDel m4 = (a, b) => a + b + c;
res = m4(5, 6);
// Voorgedefinieerde delegates
// EventHandler (oeroude)
// Predicate<int> (in onbruik geraakt)
// Procedures. Action
// Functions. Func<int>
Action <string> cw = Console.WriteLine;
// cw(res.ToString());
Func <int, int, int> m5 = Add;
res = m5(6, 7);
Func <int, int, int, int> m6 = (int a, int b, int c) => a + b + c;
res = m6(1, 2, 3);
res = Subtract(4, 5);
// C# 7.3 (2017)
int Subtract(int a, int b)
{
return(a - b + c);
};
Console.WriteLine(res);
}
static void Main(string[] args)
{
// Framework 1.0/1.1 (2002/2003)
MathDel m1 = new MathDel(Add);
int result = m1(1, 2);
// Framework 2.0 (2005)
MathDel m2 = Add;
result = m2(2, 3);
int c = 10;
MathDel m3 = delegate(int a, int b)
{
return(a + b);
};
result = m3(3, 4);
// Framework 3.0 (2007)
// Lambda expressie
MathDel m4 = (a, b) => a + b;
result = m4(4, 5);
// Functions
Func <int, int, int> m5 = Add;
result = m5(5, 6);
Func <int, int, int> m6 = (a, b) => a + b;
result = m6(6, 7);
// Procedures
Action <int> cw = nr => Console.WriteLine(nr);
cw(result);
// C# 8.0
int InlineAdd(int a, int b)
{
return(a + b);
}
result = InlineAdd(7, 8);
cw(result);
//Console.WriteLine(result);
}
static void Main(string[] args)
{
int c = 100;
// Framework 1.0/1.1 (2002, 2003)
MathDel m1 = new MathDel(Add);
int res = m1(1, 2);
// Framework 2.0 (2005)
MathDel m2 = Add;
res = m2(2, 3);
// Nieuw!!!!! Inline functies
MathDel m3 = delegate(int a, int b)
{
return(a + b);
};
res = m3(3, 4);
// Framework 3.0 (2008)
// Lambda expressions
MathDel m4 = (a, b) => a + b;
res = m4(4, 5);
// Procedures
Action <string> a1 = Console.WriteLine;
//a1(res.ToString());
// Functions
Func <int, int, int> m5 = Add;
res = m5(5, 6);
Func <int, int, int> m6 = (a, b) => a - b;
res = m6(7, 8);
// 2018 (C# 8.0)
int InlineAdd(int a, int b)
{
return(a + b);
}
res = InlineAdd(6, 7);
Console.WriteLine(res);
}
static void Main(string[] args)
{
// .NET 1.0/1.1
MathDel m1 = new MathDel(Add);
int result = m1(1, 2);
// .NET 2.0
MathDel m2 = Add;
result = m2(2, 3);
int c = 10;
MathDel m3 = delegate(int a, int b)
{
return(a + b);
};
result = m3(3, 4);
// .NET 3.0 and beyond
MathDel m4 = (a, b) => a + b;
result = m4(4, 5);
// Procedures
// Can be used for procedurers with up to 16 arguments
Action <string> m5 = (s) => Console.WriteLine("Hi " + s);
m5("Patrick");
// Functions
// For function with up to 16 arguments
// The last one betweer the brackets always represents the return type
Func <int, int, int> m6 = Add;
result = m6(7, 8);
// Predicates
// For functions that return a boolean
// Func<string bool> does the same
Predicate <string> p1 = s => s == "hi";
Console.WriteLine(p1("hi"));
Console.WriteLine(result);
}
static void Main(string[] args)
{
// Framework 1.0/1.1
MathDel m1 = new MathDel(Add);
var result = m1(1, 2);
// Framework 2.0
MathDel m2 = Add;
result = m2(2, 3);
int c = 10;
MathDel m3 = delegate(int a, int b)
{
return(a + b + c);
};
result = m3(3, 4);
// Framework 3.0/3.5
MathDel m4 = (a, b) => a + b;
result = m4(5, 6);
// Functions: Func<int>
Func <int, int, int> m5 = (a, b) => a + b;
result = m5(7, 8);
// Procedures: Action<>
Action <int> cw = Console.WriteLine;
cw(result);
//Console.WriteLine(result);
// C# 8
int LocalAdd(int a, int b)
{
return(a + b);
}
result = LocalAdd(9, 10);
cw(result);
}
static void Main(string[] args)
{
SimonvdMeer svdm = new SimonvdMeer();
WillemKlein wk = new WillemKlein();
//wk.Calculate(svdm.Subtract, 8, 4);
MathDel m1 = svdm.Add;
m1 += svdm.Add;
m1 += svdm.Subtract;
m1 -= svdm.Subtract;
m1 += svdm.Subtract;
foreach (var mi in m1.GetInvocationList())
{
Console.WriteLine(mi.Method.Name);
}
var res = m1(1, 2);
Console.WriteLine(res);
}
static void Main(string[] args)
{
//2 Object and collection initialization
Product pr = new Product {
MfgDate = new DateTime(2015, 10, 4), Name = "kenneth", ProductID = 1
};
List <Product> prods = new List <Product>
{
pr,
new Product {
MfgDate = new DateTime(2015, 10, 4), Name = "kenneth1", ProductID = 2
},
new Product {
MfgDate = new DateTime(2015, 10, 4), Name = "kenneth2", ProductID = 3
},
new Product {
MfgDate = new DateTime(2015, 10, 4), Name = "kenneth3", ProductID = 4
}
};
//3 Implicitly typed local variables
var i = 10;
var str = "hello";
var fl = 5645.67576;
//4 Anonymous Data Types
var student = new { StudentID = 10, Name = "student1", DOB = new DateTime(2015, 10, 10) };
//5 Delegates -->> Anonymous methods (2.0) -->> lamda
//5a Anonymous method--> Inline function
MathDel del = delegate(int n1, int n2)
{
return(n1 + n2);
};
Action <Product> prdaction = delegate(Product p)
{
Console.WriteLine(p.Name);
};
prods.ForEach(prdaction);
prods.ForEach(delegate(Product p)
{
Console.WriteLine(p.Name);
});
//5b lamda
MathDel del2 = (n1, n2) =>
{
return(n1 + n2);
};
prods.ForEach((p) =>
{
Console.WriteLine(p.Name);
});
MathDel del3 = (n1, n2) => n1 + n2;
prods.ForEach((p) => Console.WriteLine(p.Name));
//6a Utility/Extension Methods
string msg = "Tesco";
Console.WriteLine(msg.Welcome());
//7 Dynamic Data Type
dynamic pr1 = new Product {
MfgDate = new DateTime(2015, 10, 4), Name = "kenneth4", ProductID = 5
};
//pr1.Display(); //Display() method does not exist--> error oly at runtime
//8 Func delegate
Func <int, int, long> funcmul = (n1, n2) => n1 * n2;
Console.WriteLine(funcmul.Invoke(22, 33));
Console.ReadLine();
}
