static void Main(string[] args)
{
#region === ESERCITAZIONE ===
Esercizi.Esegui();
return;
#endregion
#region === Step 1 ===
Console.WriteLine("=== LINQ ===");
string firstName = "Roberto";
var lastName = 0.4;
//lastName = "Ajolfi"; // ERRORE!
//using var file = new StreamWriter(null);
//var data = new List<int>{ 1, 2, 3, 4 };
List <Employee <int> > data = new List <Employee <int> >
{
new Employee <int>()
};
Employee <int> firstEmployee = new Employee <int>();
Employee <string> secondEmployee;
// Extension Methods
string example = "230";
example.ToUpper();
Console.WriteLine(example.ToDouble());
var prefix = example.WithPrefix("[TST]");
Console.WriteLine(prefix);
MyString example2 = new MyString();
example2.Value = "Example";
example2.Value.ToUpper();
// OPPURE
example2.ToUpper();
foreach (var value in data)
{
Console.WriteLine("#" + value.Name);
}
Class1 class1 = new Class1();
//Class2 class2 = new ClassLib.Class2();
var person = new { firstName = "Roberto", lastName = "Ajolfi", eta = 12 };
var person2 = new { nome = "Alice", cognome = "Colella" };
var person3 = person2;
firstEmployee.ID = 9;
#endregion
#region === Step 2 ===
// EVENTS
var process = new BusinessProcess();
process.Started += Process_Started;
process.Started += Process_Started1;
process.Completed += CompletedProcess;
process.StartedCore += Process_StartedCore;
//process.ProcessData();
// DELEGATES
Sum lamiaSomma = new Sum(PrimaSomma);
//// OPPURE
Sum lamiaSomma2 = PrimaSomma;
// Sum == Func<int, int, int>
// Func and Action
Func <int, double, int> primaFunc = SecondaSomma;
Func <int, int, int> secondaFunc = PrimaSomma;
Action <int> primaAction;
//// ERRORE!!! Wrong Signature
////lamiaSomma = SecondaSomma;
//Chiamami(lamiaSomma);
//Chiamami(PrimaSomma);
//// ERRORE
//Chiamami(SecondaSomma);
#endregion
#region === Step 3 ===
Func <int, int> lamdbaZero = x => 2 * x;
Func <int, int> lamdbaZeroZero = x => {
var result = 2 * x;
return(result);
};
Func <int, int> lamdbaZeroZeroZero = Multiply;
lamdbaZeroZero(45);
var list = new List <int> {
1, 2, 3, 4, 5, 6
};
//var results = Where(dataInt, x => x > 2);
var results = list.Where(x => x > 2);
Func <int, double, bool> lambdaOne = (x, y) => x > (int)y;
#endregion
#region === Step 4 ===
List <EmployeeInt> employees = new List <EmployeeInt>
{
new EmployeeInt {
ID = 1, Name = "Roberto"
},
new EmployeeInt {
ID = 2, Name = "Alice"
},
new EmployeeInt {
ID = 3, Name = "Mauro"
},
new EmployeeInt {
ID = 4, Name = "Roberto"
},
};
var result = employees.Where("ID", "1");
var result2 = employees.Where("Name", "Roberto");
// value => value * value
ParameterExpression y = Expression.Parameter(typeof(int), "value");
var basettoni = new ParameterExpression[] {
y
};
Expression <Func <int, int> > squareExpression =
Expression.Lambda <Func <int, int> >(
Expression.Multiply(y, y),
basettoni
);
Expression <Func <int, int> > squareExpression2 = value => value * value;
Func <int, int> funzione = squareExpression.Compile();
Console.WriteLine(funzione(3));
var emp = EmployeeInt.Empty;
#endregion
#region === Step 5 ===
var products = new List <Product>
{
new Product {
ID = 1, ProductCode = "PC001"
},
new Product {
ID = 2, ProductCode = "PC001"
},
new Product {
ID = 1, ProductCode = "PC001"
}
};
int resultCount1 = products.Select(s => s).Distinct().Count();
int resultCount1a = products.Select(s => s).Distinct(new ProductComparer()).Count();
int resultCount2 = products.Select(s => new { s.ID, s.ProductCode }).Distinct().Count();
Console.WriteLine($"{resultCount1} - {resultCount1a} - {resultCount2}");
#endregion
#region === Step 6 ===
List <Employee> objEmployee = new List <Employee>()
{
new Employee()
{
Name = "Ashish Sharma", Department = "Marketing", Country = "India"
},
new Employee()
{
Name = "John Smith", Department = "IT", Country = "USA"
},
new Employee()
{
Name = "Kim Jong", Department = "Sales", Country = "China"
},
new Employee()
{
Name = "Marcia Adams", Department = "HR", Country = "USA"
},
new Employee()
{
Name = "John Doe", Department = "Operations", Country = "Canada"
}
};
var emp1 = objEmployee.ToLookup(x => x.Country);
Console.WriteLine("Grouping Employees by Country");
Console.WriteLine("---------------------------------");
foreach (var grouping in emp1)
{
Console.WriteLine(grouping.Key);
// Lookup employees by Country
foreach (var item in emp1[grouping.Key])
{
Console.WriteLine("\t" + item.Name + "\t" + item.Department);
}
}
#endregion
}
static void Main(string[] args)
{
#region === Step 1 ===
Console.WriteLine("=== LINQ ===");
string firstName = "Roberto";
var lastName = 0.4;
//lastName = "Ajolfi"; // ERRORE!
//using var file = new StreamWriter(null);
//var data = new List<int>{ 1, 2, 3, 4 };
List <Employee <int> > data = new List <Employee <int> >
{
new Employee <int>()
};
Employee <int> firstEmployee = new Employee <int>();
Employee <string> secondEmployee;
// Extension Methods
string example = "230";
example.ToUpper();
Console.WriteLine(example.ToDouble());
var prefix = example.WithPrefix("[TST]");
Console.WriteLine(prefix);
MyString example2 = new MyString();
example2.Value = "Example";
example2.Value.ToUpper();
// OPPURE
example2.ToUpper();
foreach (var value in data)
{
Console.WriteLine("#" + value.Name);
}
Class1 class1 = new Class1();
//Class2 class2 = new ClassLib.Class2();
var person = new { firstName = "Roberto", lastName = "Ajolfi", eta = 12 };
var person2 = new { nome = "Alice", cognome = "Colella" };
var person3 = person2;
firstEmployee.ID = 9;
#endregion
#region === Step 2 ===
// EVENTS
var process = new BusinessProcess();
process.Started += Process_Started;
process.Started += Process_Started1;
process.Completed += CompletedProcess;
process.StartedCore += Process_StartedCore;
process.ProcessData();
// DELEGATES
Sum lamiaSomma = new Sum(PrimaSomma);
//// OPPURE
Sum lamiaSomma2 = PrimaSomma;
// Sum == Func<int, int, int>
// Func and Action
Func <int, double, int> primaFunc = SecondaSomma;
Func <int, int, int> secondaFunc = PrimaSomma;
Action <int> primaAction;
//// ERRORE!!! Wrong Signature
////lamiaSomma = SecondaSomma;
//Chiamami(lamiaSomma);
//Chiamami(PrimaSomma);
//// ERRORE
//Chiamami(SecondaSomma);
#endregion
#region === Step 3 ===
Func <int, int> lamdbaZero = x => 2 * x;
Func <int, int> lamdbaZeroZero = x => {
var result = 2 * x;
return(result);
};
Func <int, int> lamdbaZeroZeroZero = Multiply;
lamdbaZeroZero(45);
var list = new List <int> {
1, 2, 3, 4, 5, 6
};
//var results = Where(dataInt, x => x > 2);
var results = list.Where(x => x > 2);
Func <int, double, bool> lambdaOne = (x, y) => x > (int)y;
#endregion
#region === Step 4 ===
List <EmployeeInt> employees = new List <EmployeeInt>
{
new EmployeeInt {
ID = 1, Name = "Roberto"
},
new EmployeeInt {
ID = 2, Name = "Alice"
},
new EmployeeInt {
ID = 3, Name = "Mauro"
},
new EmployeeInt {
ID = 4, Name = "Roberto"
},
};
var result = employees.Where("ID", "1");
var result2 = employees.Where("Name", "Roberto");
// value => value * value
ParameterExpression y = Expression.Parameter(typeof(int), "value");
var basettoni = new ParameterExpression[] {
y
};
Expression <Func <int, int> > squareExpression =
Expression.Lambda <Func <int, int> >(
Expression.Multiply(y, y),
basettoni
);
Expression <Func <int, int> > squareExpression2 = value => value * value;
Func <int, int> funzione = squareExpression.Compile();
Console.WriteLine(funzione(3));
#endregion
}
