static void Main(string[] args)
{
var harry = new Person("Harry");
var mary = new Person("Mary");
var jill = new Person("Jill");
var baby1 = mary.ProcreateWith(harry);
var baby2 = Person.Procreate(harry, jill);
// multiply operator overloaded with the Person class:
var baby3 = harry * mary;
WriteLine($"{harry.Name} has {harry.Children.Count} children.");
WriteLine($"{mary.Name} has {mary.Children.Count} children.");
WriteLine($"{jill.Name} has {jill.Children.Count} children.");
WriteLine(
format: "{0}'s first child is called {1}",
arg0: harry.Name,
arg1: harry.Children[0].Name
);
WriteLine($"5! is {Person.Factorial(5)}");
// assign the method defined in this program to the delegate field
// note: delegates are multicast so can assign multiple delegates to a single delegate field although no control as to order called
// so could have used += operator instead of just the = assignment operator (book page 189)
harry.Shout += Harry_Shout;
harry.Poke();
harry.Poke();
harry.Poke();
harry.Poke();
// BOOK: page 192 INTERFACES
Person[] people =
{
new Person("Simon"),
new Person("Jenny"),
new Person("Adam"),
new Person("Richard")
};
WriteLine("People unsorted: ");
foreach (var person in people)
{
Write($"{person.Name} ");
}
WriteLine();
WriteLine("People sorted - uses IComparable implementation to sort: ");
Array.Sort(people);
foreach (var person in people)
{
Write($"{person.Name} ");
}
WriteLine();
WriteLine("People sorted - uses PersonComparer (implements IComparer) class sort: ");
Array.Sort(people, new PersonComparer());
foreach (var person in people)
{
Write($"{person.Name} ");
}
WriteLine();
// BOOK: page 198 making types safely reusable with GENERICS
var t1 = new Thing();
t1.Data = 42;
WriteLine($"Thing with an integer: {t1.Process(42)}");
var t2 = new Thing();
t2.Data = "apple";
WriteLine($"Thing with an string: {t2.Process("apple")}");
// on instantiating instance of generic type, must pass a type parameter
var gt1 = new GenericThing <int>();
gt1.Data = 42;
WriteLine($"GenericThing with an integer: {gt1.Process(42)}");
var gt2 = new GenericThing <string>();
gt2.Data = "apple";
WriteLine($"GenericThing with an string: {gt2.Process("apple")}");
string number1 = "4";
WriteLine("{0} squared is {1}",
arg0: number1,
arg1: Squarer.Square <string>(number1));
byte number2 = 3;
WriteLine("{0} squared is {1}",
arg0: number1,
arg1: Squarer.Square <byte>(number2));
var vector1 = new DisplacementVector(3, 4);
var vector2 = new DisplacementVector(-2, 1);
var vector3 = vector1 + vector2;
WriteLine($"vector3: {vector3.X}, {vector3.Y}");
Employee john = new Employee
{
Name = "John Jones",
DateOfBirth = new DateTime(1990, 7, 28)
};
john.WriteToConsole();
john.EmployeeCode = "JJ001";
john.HireDate = new DateTime(2014, 11, 23);
WriteLine($"{john.Name} was hired on {john.HireDate:dd/MM/yy} with code {john.EmployeeCode}");
WriteLine(john.ToString());
WriteLine();
// BOOK: page 212 Understanding polymorphism ---------------------------------------------------------------------
// implicit casting section ****
// an instance of a derived type (Employee) can be stored in a variable of the base type (Person) - IMPLICIT CASTING
Employee aliceEmployee = new Employee {
Name = "Alice", EmployeeCode = "AA123"
};
Person alicePerson = aliceEmployee; // IMPLICIT casting
WriteLine("Understanding Polymorphism section: ");
WriteLine("alicePerson has just been assigned to aliceEmployee i.e. alicePerson = aliceEmployee");
WriteLine();
WriteLine("Now calling aliceEmployee.WriteToConsole(), then alicePerson.WriteToConsole()");
aliceEmployee.WriteToConsole(); // Employee.WriteToConsole(): Alice was born on 01/01/01 and hired on 01/01/01
alicePerson.WriteToConsole(); // Person.WriteToConsole(): Alice was born on a Monday
WriteLine("Calling aliceEmployee.ToString(): " + aliceEmployee.ToString()); // Employee.ToString(): Alice's code is AA123
WriteLine("Calling alicePerson.ToString(): " + alicePerson.ToString()); // Employee.ToString(): Alice's code is AA123
// explicit casting section - and avoiding Casting Exceptions two options: use 'is' or 'as' keywords ****
// use keyword 'is'
if (alicePerson is Employee)
{
WriteLine($"{nameof(alicePerson)} IS an Employee - because of earlier assignment: alicePerson = aliceEmployee");
// safe to cast
Employee explicitAlice = (Employee)alicePerson;
}
Employee aliceAsEmployee = alicePerson as Employee; // keyword 'as' used to explicity cast --> need to check for null though
if (aliceAsEmployee != null)
{
WriteLine($"{nameof(alicePerson)} AS an Employee - because of earlier assignment: Employee aliceAsEmployee = alicePerson as Employee");
}
// BOOK: page 216 Inheriting exceptions ---------------------------------------------------------------------
try
{
john.TimeTravel(new DateTime(1999, 12, 31));
john.TimeTravel(new DateTime(1950, 12, 25));
}
catch (PersonException ex)
{
WriteLine(ex.Message);
}
// BOOK: page 218 Extending types when you cannot inherit (sealed) ---------------------------------------------------------------------
string email1 = "*****@*****.**";
string email2 = "test&test.com";
WriteLine("{0} is a valid email address: {1}",
arg0: email1,
arg1: StringExtensions.IsValidEmail(email1));
WriteLine("{0} is a valid email address: {1}",
arg0: email2,
arg1: StringExtensions.IsValidEmail(email2));
WriteLine("{0} is a valid email address: {1}",
arg0: email1,
arg1: email1.IsValidEmail());
WriteLine("{0} is a valid email address: {1}",
arg0: email2,
arg1: email2.IsValidEmail());
}
static void Main(string[] args)
{
var harry = new Person {
Name = "Harry"
};
var mary = new Person {
Name = "Mary"
};
var jill = new Person {
Name = "Jill"
};
// call instance method
var baby1 = mary.Procreate(harry);
// call static method
var baby2 = Person.Procreate(harry, jill);
// call an operator
var baby3 = harry * mary;
WriteLine($"{harry.Name} has {harry.Children.Count} children");
WriteLine($"{mary.Name} has {mary.Children.Count} children");
WriteLine($"{jill.Name} has {jill.Children.Count} children");
WriteLine(
$"{harry.Name}'s first child is named \"{harry.Children[0].Name}\"."
);
WriteLine($"5! is {Person.Factorial(5)}");
harry.Shout += Harry_Shout;
harry.Poke();
harry.Poke();
harry.Poke();
harry.Poke();
Person[] people =
{
new Person {
Name = "Simon"
},
new Person {
Name = "Jenny"
},
new Person {
Name = "Adam"
},
new Person {
Name = "Richard"
}
};
WriteLine("Initial list of people:");
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use Person's IComparable implementation to sort:");
Array.Sort(people);
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use PersonComparer's IComparer implementation to sort:");
Array.Sort(people, new PersonComparer());
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
var t1 = new Thing();
t1.Data = 42;
WriteLine($"Thing with an integer: {t1.Process(42)}");
var t2 = new Thing();
t2.Data = "apple";
WriteLine($"Thing with a string: {t2.Process("apple")}");
var gt1 = new GenericThing <int>();
gt1.Data = 42;
WriteLine($"GenericThing with an integer: {gt1.Process(42)}");
var gt2 = new GenericThing <string>();
gt2.Data = "apple";
WriteLine($"GenericThing with a string: {gt2.Process("apple")}");
string number1 = "4";
WriteLine($"{number1} squared is {Squarer.Square<string>(number1)}");
byte number2 = 3;
WriteLine($"{number2} squared is {Squarer.Square(number2)}");
var dv1 = new DisplacementVector(3, 5);
var dv2 = new DisplacementVector(-2, 7);
var dv3 = dv1 + dv2;
WriteLine(
$"({dv1.X}, {dv1.Y}) + ({dv2.X}, {dv2.Y}) = ({ dv3.X}, { dv3.Y})"
);
Employee john = new Employee
{
Name = "John Jones",
DateOfBirth = new DateTime(1990, 7, 28)
};
john.WriteToConsole();
john.EmployeeCode = "JJ001";
john.HireDate = new DateTime(2014, 11, 23);
WriteLine($"{john.Name} was hired on {john.HireDate:dd/MM/yy}");
WriteLine(john.ToString());
Employee aliceInEmployee = new Employee
{
Name = "Alice",
EmployeeCode = "AA123"
};
Person aliceInPerson = aliceInEmployee;
aliceInEmployee.WriteToConsole();
aliceInPerson.WriteToConsole();
WriteLine(aliceInEmployee.ToString());
WriteLine(aliceInPerson.ToString());
if (aliceInPerson is Employee)
{
WriteLine($"{nameof(aliceInPerson)} IS an Employee");
Employee explicitAlice = (Employee)aliceInPerson;
}
try
{
john.TimeTravel(new DateTime(1999, 12, 31));
john.TimeTravel(new DateTime(1950, 12, 25));
}
catch (PersonException ex)
{
WriteLine(ex.Message);
}
string email1 = "*****@*****.**";
string email2 = "ian&test.com";
WriteLine(
"{0} is a valid email address: {1}",
email1,
email1.IsValidEmail()
);
WriteLine(
"{0} is a valid email address: {1}",
email2,
email2.IsValidEmail()
);
}
// Sample
static void Main(string[] args)
{
var harry = new Person {
Name = "Harry"
};
var mary = new Person {
Name = "Mary"
};
var jill = new Person {
Name = "Jill"
};
// Implementing functionality using methods and operators
// call instance method
var baby1 = mary.ProcreateWith(harry);
// call static method
var baby2 = Person.Procreate(harry, jill);
// call an operator
var baby3 = harry * mary;
WriteLine($"{harry.Name} has {harry.Children.Count} children.");
WriteLine($"{mary.Name} has {mary.Children.Count} children.");
WriteLine($"{jill.Name} has {jill.Children.Count} children.");
WriteLine(
format: "{0}'s first child is named \"{1}\".",
arg0: harry.Name,
arg1: harry.Children[0].Name);
// Implementing functionality using local functions
WriteLine($"5! is {Person.Factorial(5)}");
// Raising and handling events
harry.Shout += Harry_Shout;
harry.Poke();
harry.Poke();
harry.Poke();
harry.Poke();
// Comparing objects when sorting
Person[] people =
{
new Person {
Name = "Simon"
},
new Person {
Name = "Jenny"
},
new Person {
Name = "Adam"
},
new Person {
Name = "Richard"
}
};
WriteLine("Initial list of people:");
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use Person's IComparable implementation to sort:");
Array.Sort(people);
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
// Comparing objects using a separate class
WriteLine("Use PersonComparer's IComparer implementation to sort:");
Array.Sort(people, new PersonComparer());
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
// Working with generic types
var t1 = new Thing();
t1.Data = 42;
WriteLine($"Thing with an integer: {t1.Process(42)}");
var t2 = new Thing();
t2.Data = "apple";
WriteLine($"Thing with a string: {t2.Process("apple")}");
var gt1 = new GenericThing <int>();
gt1.Data = 42;
WriteLine($"GenericThing with an integer: {gt1.Process(42)}");
var gt2 = new GenericThing <string>();
gt2.Data = "apple";
WriteLine($"GenericThing with a string: {gt2.Process("apple")}");
// Working with generic methods
string number1 = "4";
WriteLine("{0} squared is {1}",
arg0: number1,
arg1: Squarer.Square <string>(number1));
byte number2 = 3;
WriteLine("{0} squared is {1}",
arg0: number2,
arg1: Squarer.Square(number2));
// Working with struct types
var dv1 = new DisplacementVector(3, 5);
var dv2 = new DisplacementVector(-2, 7);
var dv3 = dv1 + dv2;
WriteLine($"({dv1.X}, {dv1.Y}) + ({dv2.X}, {dv2.Y}) = ({dv3.X}, {dv3.Y})");
// Inheriting from classes
Employee john = new Employee
{
Name = "John Jones",
DateOfBirth = new DateTime(1990, 7, 28)
};
john.WriteToConsole();
// Extending classes
john.EmployeeCode = "JJ001";
john.HireDate = new DateTime(2014, 11, 23);
WriteLine($"{john.Name} was hired on {john.HireDate:dd/MM/yy}");
// Overriding members
WriteLine(john.ToString());
// Understanding polymorphism
Employee aliceInEmployee = new Employee
{
Name = "Alice", EmployeeCode = "AA123"
};
Person aliceInPerson = aliceInEmployee;
aliceInEmployee.WriteToConsole();
aliceInPerson.WriteToConsole();
WriteLine(aliceInEmployee.ToString());
WriteLine(aliceInPerson.ToString());
// Explicit casting
if (aliceInPerson is Employee)
{
WriteLine($"{nameof(aliceInPerson)} IS an Employee");
Employee explicitAlice = (Employee)aliceInPerson;
// safely do something with explicitAlice
}
Employee aliceAsEmployee = aliceInPerson as Employee;
if (aliceAsEmployee != null)
{
WriteLine($"{nameof(aliceInPerson)} AS an Employee");
// do something with aliceInEmployee
}
// Inheriting exceptions
try
{
john.TimeTravel(new DateTime(1999, 12, 31));
john.TimeTravel(new DateTime(1950, 12, 25));
}
catch (PersonException ex)
{
WriteLine(ex.Message);
}
// Using static methods to reuse functionality
string email1 = "*****@*****.**";
string email2 = "ian&test.com";
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email1,
arg1: StringExtensions.IsValidEmail(email1));
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email2,
arg1: StringExtensions.IsValidEmail(email2));
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email1,
arg1: email1.IsValidEmail());
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email2,
arg1: email2.IsValidEmail());
}
static void Main(string[] args)
{
/* Ch05 Commented for clarity while working through Chapter 06
* var bob = new Person();
* bob.Name = "Bob Smith";
* bob.DateOfBirth = new DateTime(1965, 12, 22);
* bob.FavoriteAncientWonder = WondersOfTheAncientWorld.StatusOfZeusAtOlympia;
* var alice = new Person
* {
* Name = "Alice Jones",
* DateOfBirth = new DateTime(1998, 3, 7)
* };
*
* WriteLine(format: "{0} was born on {1: dddd, d MMMM yyyy}",
* arg0: bob.Name,
* arg1: bob.DateOfBirth);
*
* WriteLine(format: "{0} was born on {1:dd MMM yy}", arg0: alice.Name,
* arg1: alice.DateOfBirth);
* WriteLine(format: "{0}'s favorite wonder is {1}. Its integer is {2}.", arg0: bob.Name, arg1: bob.FavoriteAncientWonder, arg2: (int)bob.FavoriteAncientWonder);
*
* bob.BucketList = WondersOfTheAncientWorld.HangingGardensOfBabylon | WondersOfTheAncientWorld.MausoleumAtHalicarnassus;
* // Another option is to set the value by casting 18 to the enum type, but this is more difficult to read
* // bob.BucketList = (WondersOfTheAncientWorld)18;
* WriteLine($"{bob.Name}'s bucket list is {bob.BucketList}");
*
* bob.Children.Add(new Person { Name = "Alfred" });
* bob.Children.Add(new Person { Name = "Zoe" });
* WriteLine($"{bob.Name} has {bob.Children.Count} children:");
* for (int child = 0; child < bob.Children.Count; child++)
* {
* WriteLine($"{bob.Children[child].Name}");
* }
* // as a bonus, use a foreach statement
* foreach (var children in bob.Children)
* {
* WriteLine($"{children.Name}");
* }
*
* BankAccount.InterestRate = 0.012M; // store a shared value
* var jonesAccount = new BankAccount();
* jonesAccount.AccountName = "Mrs. Jones";
* jonesAccount.Balance = 2400;
*
* WriteLine(format: "{0} earned {1:C} interest.", arg0: jonesAccount.AccountName, arg1: jonesAccount.Balance * BankAccount.InterestRate);
* var gerrierAccount = new BankAccount();
* gerrierAccount.AccountName = "Ms. Gerrier";
* gerrierAccount.Balance = 98;
*
* WriteLine(format: "{0} earned {1:C} interest", arg0: gerrierAccount.AccountName, arg1: gerrierAccount.Balance * BankAccount.InterestRate);
* WriteLine($"{bob.Name} is a {Person.Species}");
* WriteLine($"{bob.Name} was born on {bob.HomePlanet}");
* var blankPerson = new Person();
* WriteLine(format:
* "{0} of {1} was created at {2:hh:mm:ss} on a {2:dddd}.",
* arg0: blankPerson.Name,
* arg1: blankPerson.HomePlanet,
* arg2: blankPerson.Instantiated);
*
* var gunny = new Person("Gunny", "Mars");
* WriteLine(format:
* "{0} of {1} was created at {2:hh:mm:ss} on a {2:dddd}.",
* arg0: gunny.Name,
* arg1: gunny.HomePlanet,
* arg2: gunny.Instantiated);
*
* // methods
* bob.WriteToConsole();
* WriteLine(bob.GetOrigin());
*
* // using tuples
* (string, int) fruit = bob.GetFruit();
* WriteLine($"{fruit.Item1}, {fruit.Item2} there are");
*
* // named tuples
* var fruitNamed = bob.GetNamedFruit();
* WriteLine($"There are {fruitNamed.Number} {fruitNamed.Name}.");
* var thing1 = ("Neville", 4);
*
* // inferring tuple names
* WriteLine($"{thing1.Item1} has {thing1.Item2} children.");
* var thing2 = (bob.Name, bob.Children.Count);
* WriteLine($"{thing2.Name} has {thing2.Count} children.");
*
* // deconstructed
* (string fruitName, int fruitNumber) = bob.GetFruit();
* WriteLine($"Deconstructed: {fruitName}, {fruitNumber}");
*
* // passing parameters to methods + overloading methods
* WriteLine(bob.SayHello());
* WriteLine(bob.SayHello("Emily"));
*
* // optional parameters
* WriteLine(bob.OptionalParameters());
* // inferred by position
* WriteLine(bob.OptionalParameters("Jump!", 98.5));
* // select using named params
* WriteLine(bob.OptionalParameters(number: 52.7, command: "Hide!"));
* // use named parameters to skip over optional params
* WriteLine(bob.OptionalParameters("Poke!", active: false));
*
* // controlling how parameters are passed
* int a = 10;
* int b = 20;
* int c = 30;
*
* WriteLine($"Before a = {a}, b = {b}, c = {c}");
* bob.PassingParameters(a, ref b, out c);
* WriteLine($"After: a = {a}, {b} = b, c = {c}");
* int d = 10;
* int e = 20;
* WriteLine($"Before d = {d}, e = {e}, f doesn't exist yet!");
* // simplified C# 7.0 syntax for out parameter
* bob.PassingParameters(d, ref e, out int f);
* WriteLine($"After: d = {d}, e = {e}, f = {f}");
* var sam = new Person
* {
* Name = "Sam",
* DateOfBirth = new DateTime(1972, 1, 27)
* };
* WriteLine(sam.Origin);
* WriteLine(sam.Greeting);
* WriteLine(sam.Age);
* sam.FavoriteIceCream = "Chocolate Fudge";
* WriteLine($"Sam's favorite ice-cream flavor is {sam.FavoriteIceCream}.");
* sam.FavoritePrimaryColor = "Red";
* WriteLine($"Sam's favorite primary color is {sam.FavoritePrimaryColor}.");
*
* // indexers
* sam.Children.Add(new Person { Name = "Charlie" });
* sam.Children.Add(new Person { Name = "Ella" });
* WriteLine($"Sam's first child is {sam.Children[0].Name}");
* WriteLine($"Sam's second child is {sam.Children[1].Name}");
* WriteLine($"Sam's first child is {sam[0].Name}");
* WriteLine($"Sam's second child is {sam[1].Name}");
***END BLOCK COMMENT *** END BLOCK COMMENT */
var harry = new Person {
Name = "Harry"
};
var mary = new Person {
Name = "Mary"
};
var jill = new Person {
Name = "Jill"
};
// call instance method
var baby1 = mary.ProcreateWith(harry);
// call static method
var baby2 = Person.Procreate(harry, jill);
// call an operator
var baby3 = harry * mary;
WriteLine($"{harry.Name} has {harry.Children.Count} children.");
WriteLine($"{mary.Name} has {mary.Children.Count} children.");
WriteLine($"{jill.Name} has {jill.Children.Count} children");
WriteLine(format: "{0}'s first child is named \"{1}\".", arg0: harry.Name, arg1: harry.Children[0].Name);
WriteLine($"5! is {Person.Factorial(5)}");
harry.Shout += Harry_Shout; // "By assigning a method, () would replace
harry.Poke();
harry.Poke();
harry.Poke();
harry.Poke();
Person[] people =
{
new Person {
Name = "Simon"
},
new Person {
Name = "Jimmy"
},
new Person {
Name = "Richard"
},
new Person {
Name = "Adam"
},
};
WriteLine("Initial list of people:");
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use Person's IComparable implementation to sort:");
Array.Sort(people);
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use PersonComparer's IComparer implementation to sort:");
Array.Sort(people, new PersonComparer());
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
var t1 = new Thing();
t1.Data = 42;
WriteLine($"Thing with an integer: {t1.Process(42)}");
var t2 = new Thing();
t2.Data = "apple";
WriteLine($"Thing with a string: {t2.Process("apple")}");
var gt1 = new GenericThing <int>();
gt1.Data = 42;
WriteLine($"GenericThing with an integer: {gt1.Process(42)}");
var gt2 = new GenericThing <string>();
gt2.Data = "Apple";
WriteLine($"GenericThing with an string: {gt2.Process("Apple")}");
string number1 = "4";
WriteLine($"{number1} squared is {Squarer.Square<string>(number1)}");
byte number2 = 3;
WriteLine($"{number2} squared is {Squarer.Square(number2)}");
var dv1 = new DisplacementVector(3, 5);
var dv2 = new DisplacementVector(-2, 7);
var dv3 = dv1 + dv2;
WriteLine($"({dv1.X}, {dv1.Y}) + ({dv2.X}, {dv2.Y}) = ({dv3.X}, {dv3.Y})");
Employee john = new Employee
{
Name = "John Jones",
DateOfBirth = new DateTime(1990, 7, 28)
};
john.WriteToConsole();
john.EmployeeCode = "JJ001";
john.HireDate = new DateTime(2014, 11, 23);
WriteLine($"{john.Name} was hired on {john.HireDate:dd/MM/yy}");
// Writes Packt.Shared.Employee
WriteLine(john.ToString());
Employee aliceInEmployee = new Employee
{
Name = "Alice",
EmployeeCode = "AA123"
};
Person aliceInPerson = aliceInEmployee;
aliceInEmployee.WriteToConsole();
aliceInPerson.WriteToConsole();
WriteLine(aliceInEmployee.ToString());
WriteLine(aliceInPerson.ToString());
// explicit casting
// Employee explicitAlice = (Employee)aliceInPerson;
if (aliceInPerson is Employee)
{
WriteLine($"{nameof(aliceInPerson)} IS an Employee");
Employee explicitAlice = (Employee)aliceInPerson;
// safely do something with explicitAlice
}
Employee aliceAsEmployee = aliceInPerson as Employee;
if (aliceAsEmployee != null)
{
WriteLine($"{nameof(aliceInPerson)} AS an Employee");
// do something with aliceAsEmployee
}
// Inheriting Exceptions
try
{
john.TimeTravel(new DateTime(1999, 12, 31));
john.TimeTravel(new DateTime(1950, 12, 25));
}
catch (PersonException ex)
{
WriteLine(ex.Message);
}
// Using Static methods to reuse functionality
string email1 = "*****@*****.**";
string email2 = "ian&test.com";
/*
* WriteLine(
* "{0} is a valid e-mail address: {1}",
* arg0: email1,
* arg1: StringExtensions.IsValidEmail(email1));
* WriteLine(
* "{0} is a valid e-mail address: {1}",
* arg0: email2,
* arg1: StringExtensions.IsValidEmail(email2));
*/
// Using Extension Methods to reuse functionality
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email1,
arg1: email1.IsValidEmail());
WriteLine(
"{0} is a valid e-mail address: {1}",
arg0: email2,
arg1: email2.IsValidEmail());
}
static void Main(string[] args)
{
var harry = new Person {
Name = "Harry"
};
var mary = new Person {
Name = "Mary"
};
var jill = new Person {
Name = "Jill"
};
// call instance method
var baby1 = mary.ProcreateWith(harry);
// call static method
var baby2 = Person.Procreate(harry, jill);
// call an operator
var baby3 = harry * mary;
WriteLine($"{mary.Name} has {mary.Children.Count} children.");
WriteLine($"{harry.Name} has {harry.Children.Count} children.");
WriteLine($"{jill.Name} has {jill.Children.Count} children.");
WriteLine($"{mary.Name}'s first child is named \"{mary.Children[0].Name}\".");
WriteLine($"5! is {Person.Factorial(5)}");
harry.Shout += Harry_Shout;
harry.Poke();
harry.Poke();
harry.Poke();
harry.Poke();
Person[] people =
{
new Person {
Name = "Juliani"
},
new Person {
Name = "Simon"
},
new Person {
Name = "Zoraide"
},
new Person {
Name = "Alan"
},
new Person {
Name = "Pedro"
},
new Person {
Name = "Beatriz"
}
};
WriteLine("Initial list of people: ");
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use Person's IComparable implementation to sort: ");
Array.Sort(people);
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
WriteLine("Use PersonComparer's IComparer implementation to sort:");
Array.Sort(people, new PersonComparer());
foreach (var person in people)
{
WriteLine($"{person.Name}");
}
var t = new Thing();
t.Data = 42;
WriteLine($"Thing: {t.Process("42")}");
var gt = new GenericThing <int>();
gt.Data = 42;
WriteLine($"GenericThing: {gt.Process("42")}");
string number1 = "4";
WriteLine($"{number1} squared is {Squarer.Square<string>(number1)}");
byte number2 = 3;
WriteLine($"{number2} squared is {Squarer.Square<byte>(number2)}");
var dv1 = new DisplacementVector(3, 5);
var dv2 = new DisplacementVector(-2, 7);
var dv3 = dv1 + dv2;
WriteLine($"({dv1.X}, {dv1.Y}) + ({dv2.X}, {dv2.Y}) = ({dv3.X},{dv3.Y})");
Employee e1 = new Employee {
Name = "John Jones",
DateOfBirth = new DateTime(1990, 7, 28)
};
e1.WriteToConsole();
e1.EmployeeCode = "JJ001";
e1.HireDate = new DateTime(2014, 11, 23);
WriteLine($"{e1.Name} was hired on {e1.HireDate:dd/MM/yy}");
WriteLine(e1.ToString());
Employee aliceInEmployee = new Employee {
Name = "Alice", EmployeeCode = "AA123"
};
Person aliceInPerson = aliceInEmployee;
aliceInEmployee.WriteToConsole();
aliceInPerson.WriteToConsole();
WriteLine(aliceInEmployee.ToString());
WriteLine(aliceInPerson.ToString());
if (aliceInPerson is Employee)
{
WriteLine($"{nameof(aliceInPerson)} IS an Employee");
Employee e2 = (Employee)aliceInPerson;
// do something with e2
}
Employee e3 = aliceInPerson as Employee;
if (e3 != null)
{
WriteLine($"{nameof(aliceInPerson)} AS an Employee");
// do something with e3
}
try {
e1.TimeTravel(new DateTime(1999, 12, 31));
e1.TimeTravel(new DateTime(1950, 12, 25));
}
catch (PersonException ex) {
WriteLine(ex.Message);
}
string email1 = "*****@*****.**";
string email2 = "ian&test.com";
WriteLine($"{email1} is a valid e-mail address: {StringExtensions.IsValidEmail(email1)}.");
WriteLine($"{email2} is a valid e-mail address: {StringExtensions.IsValidEmail(email2)}.");
WriteLine($"{email1} is a valid e-mail address:{email1.IsValidEmail()}.");
WriteLine($"{email2} is a valid e-mail address:{email2.IsValidEmail()}.");
}
