static void Main(string[] args)
{
Func <int, int> square = x => x * x;
Console.WriteLine(square(5));
int[] numbers = { 2, 3, 4, 5 };
var squaredNumbers = numbers.Select(x => x * x);
Console.WriteLine(string.Join(" ", squaredNumbers));
Action line = () => Console.WriteLine();
line();
CalcMethod add = (a, b) => a + b;
CalcMethod subtract = (a, b) => a - b;
Console.WriteLine(add(10, 20));
Console.WriteLine(subtract(10.5, 20));
IsTeenAger isTeenAger = delegate(Student s) { return(s.Age > 12 && s.Age < 20); };
Student s1 = new Student()
{
Name = "John", Age = 18
};
Console.WriteLine("{0}은 {1}.", s1.Name, isTeenAger(s1) ? "청소년입니다" : "청소년이 아닙니다");
IsAdult isAdult = (s) => {
int adultAge = 18;
return(s.Age >= adultAge);
};
Student s2 = new Student()
{
Name = "Robin", Age = 20
};
Console.WriteLine("{0}은 {1}.", s2.Name, isAdult(s2) ? "성인입니다" : "성인이 아닙니다");
}
/// <summary>
/// The lambda expression is a shorter way of representing anonymous method using some special syntax.
/// For example, following function checks if student is teenager or not
/// </summary>
public void TestLambdaBasicSyntax()
{
IsTeenAger isTeenAger = s => s.Age > 12 && s.Age < 20;
Student stud = new Student()
{
Age = 25
};
Console.WriteLine(isTeenAger(stud));
}
private static void LambdaExpressionsEx()
{
IsTeenAger isTeenAger = s => s.Age > 12 && s.Age < 20;
Student stud = new Student()
{
Age = 25
};
Console.WriteLine(isTeenAger(stud));
}
public static void Main()
{
IsTeenAger isTeenAger = s => s.Age > 12 && s.Age < 20;
Student stud = new Student()
{
Age = 25
};
Console.WriteLine(isTeenAger(stud));
}
static void Main(string[] args)
{
// Example: Anonymous Method in C#
IsTeenAger isTeenAger = delegate(Student s) { return(s.Age > 12 && s.Age < 20); };
Student stud = new Student()
{
Age = 25
};
Console.WriteLine(isTeenAger(stud));
}
public static void Main()
{
IsTeenAger isTeenAger = delegate(Student s) { return(s.Age > 12 && s.Age < 20); };
Student stud = new Student()
{
Age = 25
};
Console.WriteLine(isTeenAger(stud));
AnanymousStudent();
}
public static bool FuncLinq()
{
Student std = new Student();
//using delegate
IsTeenAger isStudentTeen = s => s.Age > 12 && s.Age < 20;
isStudentTeen(std); // false
//using Func delegate has return and input
Func <Student, bool> isStudentteenager = s => s.Age > 12 && s.Age < 20;
bool isTeen = isStudentteenager(std); //false
return(isTeen);
}
