static void Main(string[] args)
{
Multiplayer calc = (x, y) => x * y;
//same as Func<int,int,int>
PrintSomething action = () => Console.WriteLine("Hello!");
//same as action()
Action <string> print = message => Console.WriteLine(message);
}
delegate void PrintSomething(object x); //pass anything
static void Main(string[] args)
{
//how to call anonymous method:
//imagine that you are declaring a variable as method ????????imagine??????
//syntax: anonymoudMethod m1 = delegate { };
anonymoudMethod m1 = delegate { }; // as type looooooooooooooool
m1(); //-> method name now called m1,
anonymoudMethod m2 = delegate { string name = "Salah"; Console.WriteLine(name); }; //Create string
m2(); //-> method name called m2()
anonymoudMethod m3 = delegate { Console.WriteLine("Anonymous Method - 3"); }; //add things
m3(); //-> method name called m3()
anonymoudMethod m4 = delegate {
//here is method, returns void - do whatever with it
Console.WriteLine("Welcome to anonymous method#4");
};
m4();
Console.WriteLine("====================================");
//now call another anonymous method that has a return type int:
returnIntNow rInt_1 = delegate { return(1); }; //must return something - return int type
Console.WriteLine(rInt_1()); //1
Console.WriteLine("====================================");
returnIntNow rInt_2 = delegate { int x = 15, y = 16, res = x * y; return(res); }; //must return int type
Console.WriteLine(rInt_2()); //15*16=240
Console.WriteLine("====================================");
//use PrintSomething(object x)
PrintSomething Ps = delegate(object x) { Console.WriteLine("Object passed => {0}", x); };
Ps("salah");
Ps("Imad");
Ps("Bedeiwi");
Ps(153.65);
Ps(18);
Console.WriteLine("====================================");
PrintSomething getNumTimes = delegate(object x) {
int square = (int)x * (int)x; Console.WriteLine("Square of {0} is {1}", x, square);
};
getNumTimes(15); //125
Console.WriteLine("====================================");
//get square of all values in array
int[] arr1 = new int[] { 15, 18, 19, 20, 21, 22, 23, 36 };
foreach (int a in arr1)
{
getNumTimes(a);
}
Console.ReadKey();
}
public void InvokeDelegate()
{
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
var myDelegate = new PrintSomething(PrintTime);
while (true)
{
if (stopwatch.Elapsed.Seconds != this.seconds)
{
continue;
}
myDelegate.Invoke();
stopwatch.Restart();
}
}
static void Main()
{
//Problem 1 test
string text = "Some short text";
Console.WriteLine(text.SBSubstring(2, 6) + "\n");
//Problem 2 test
int[] numbers = { 2, 4, 6, 7, 3 };
double[] doubleNumbers = { 2.4, 5.6, 14.2, 23.345 };
Console.WriteLine(numbers.SumElements());
Console.WriteLine(numbers.MaxElement());
Console.WriteLine(numbers.MinElement());
Console.WriteLine(numbers.ProductOfElements());
Console.WriteLine(numbers.Avg() + "\n");
Console.WriteLine(doubleNumbers.SumElements());
Console.WriteLine(doubleNumbers.MaxElement());
Console.WriteLine(doubleNumbers.MinElement());
Console.WriteLine(doubleNumbers.ProductOfElements());
Console.WriteLine(doubleNumbers.Avg() + "\n");
//Problem 3 test
Students ivan = new Students("Ivan", "Petrov", 15);
Students anotherIvan = new Students("Ivan", "Dimitrov", 17);
Students petar = new Students("Petar", "Ivanov", 20);
Students mariya = new Students("Mariya", "Dimitrova", 25);
Students petya = new Students("Petya", "Angelova", 22);
Students dimitar = new Students("Dimitar", "Kostov", 19);
Students[] students = { ivan, anotherIvan, petar, mariya, petya, dimitar };
Console.WriteLine("All students:\n" + string.Join(", ", students) + "\n");
Console.WriteLine("Students, whose first name is before their last name alphabeticaly:\n" +
LINQ.FirstBeforeLastName(students) + "\n");
//Problem 4 test
Console.WriteLine("Students who are between 18 and 24 years old:\n" + LINQ.AgeRange(students) + "\n");
//Problem 5 test
Console.WriteLine("Decsending ordered Students:\n" + LINQ.OrderStudents(students) + "\n");
//Problem 6 test
int[] nums = { 2, 4, 5, 7, 9, 14, 27 };
Console.WriteLine("Numbers divisible by 7 and 3:\n" + LINQ.DivisibleBy7And3(nums) + "\n");
//Problem 7 test - Timer: prints only 5 times so it takes 10seconds
Console.WriteLine("Timer:");
int counter = 0;
while (counter < 5)
{
Thread.Sleep(2000);
PrintSomething print = Timer.PrintTime;
print(2);
counter++;
}
//Problem 9 test
Student ivanIvanov = new Student("Ivan", "Ivanov", 123006, "+359 123123123", "*****@*****.**", new List <int> {
2, 3, 5, 4, 5, 2
}, 2);
Student petyaPetrova = new Student("Petya", "Petrova", 258006, "+359 258258258", "*****@*****.**", new List <int> {
4, 2, 2, 5, 6, 2
}, 3);
Student dimitarKolev = new Student("Dimitar", "Kolev", 369008, "02/ 369369369", "*****@*****.**", new List <int> {
5, 6, 3, 6, 4, 2
}, 2);
List <Student> anotherStudents = new List <Student> {
ivanIvanov, petyaPetrova, dimitarKolev
};
Console.WriteLine("All students:\n" + string.Join("\r\n", anotherStudents) + "\n");
Console.WriteLine("Students by group 2:\n" + LINQ.StudentsByGroup2(anotherStudents));
//Problem 10 test - the same as problem 9 with extension method
Console.WriteLine(anotherStudents.ByGroup2());
//Problem 11 test
Console.WriteLine("Students with e-mail in abv.bg:\n" + LINQ.StudentsAbv(anotherStudents) + "\n");
//Problem 12 test - Sofia's phone code is 02
Console.WriteLine("Students with telephones from Sofia:\n" + LINQ.PhonesFromSofia(anotherStudents) + "\n");
//Problem 13 test
Console.WriteLine("Students who have least one exellent marks:\n" + LINQ.OneOrMoreExellentMarks(anotherStudents) + "\n");
//Problem 14 test
Console.WriteLine("Students who have exactly two poor marks:\n" + string.Join("\r\n", anotherStudents.TwoPoorMarks()) + "\n");
//Problem 15 test - 5th and 6th digits are 0 and 6
Console.WriteLine("Students that enrolled in 2006:\n" + string.Join("\r\n", anotherStudents.StudentsIn2006()) + "\n");
//Problem 17 test
string[] fruits = { "apple", "orange", "banana", "strawberry" };
Console.WriteLine("Longest string: " + LINQ.LongestString(fruits) + "\n");
//Problem 18 test
LINQ.GroupByGroup(anotherStudents);
//Problem 19 test
anotherStudents.GroupStudents();
}
public static void SendString(PrintSomething ps)
{
//add code that invokes delegate object
ps("Total awesomeness that you will never forget");
}
