static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var player = new MoviePlayer
{
CurrentMovie = new Movie
{
Title = "The Lion King",
ReleaseDate = new DateTime(2019, 7, 19)
}
};
// we are treating methods as just another form of data
// that can be in variables etc.
MoviePlayer.MovieEndHandlerNoParam handler = AnnounceEndOfMovie;
MoviePlayer.MovieEndHandlerWithTitle handler2 = AnnounceEndOfMovieByName;
Action <string> handler3 = AnnounceEndOfMovieByName;
// instead of declaring methods, i can use lambda expressions
// to create functions in-line
Action <string> handler4 = title => Console.WriteLine(title);
Func <int, int, int> add = (a, b) => a + b;
bool x = add(3, 4) == 7;
// lambda expressions also allow "block body" like regular methods.
Func <string, int> printLength = value =>
{
Console.WriteLine(value.Length);
return(value.Length);
};
// subscribe to events with +=
player.MovieEnd += handler4;
player.MovieEnd += (title) => Console.WriteLine($"{title} is over from lambda.");
//player.MovieEnd += handler2;
//player.MovieEnd += handler2;
//player.MovieEnd -= handler2; // unsubscribe with -=
player.Play();
Linq();
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
var player = new MoviePlayer
{
Currentmovie = new Movie
{
Title = "The Lion King",
ReleaseDate = new DateTime(2019, 7, 19)
}
};
//we are treating methods as just another form of data
//that can be in variables etc.
MoviePlayer.MovieEndHandlerNoParam handler = AnnounceEndOfMovie;
MoviePlayer.MovieEndHandlerWithTitle handler2 = AnnounceEndOfMovieByName;
Action <string> handler3 = AnnounceEndOfMovieByName;
Action <string> handler4 = (title) => Console.WriteLine(title);
Func <int, int, int> add = (a, b) => a + b;
bool x = add(3, 4) == 7;
Func <string, int> printLength = value =>
{
Console.WriteLine(value.Length);
return(value.Length);
};
//subscribe with +=
player.MovieEnd += handler2;
//unsubscribe with -=
player.MovieEnd -= handler2;
player.MovieEnd += (title) => Console.WriteLine($"(title) is over from lambda");
player.Play();
}
