Pattern matching can be quite powerful, e.g. in C# (which I wish was more indepth / more featured, it still feels a bit immature :( ) ``` switch(foo)

Pattern matching can be quite powerful, e.g. in C# (which I wish was more indepth / more featured, it still feels a bit immature :( ) ``` switch(foo) { case TextBox t: Console.Writeline(t.Text); break; case TextBox when t.Text = "Bob": Console.WriteLine("Hello Bob"); break; case Combobox c: Console.WriteLine($"{c.SelectedItem}"); break; case null: Console.WriteLine("Ooops, null!"); break; case int i when i == 5: Console.WriteLine("got an int, and it was 5!"); break; case default: // handle the default case. break; } ``` IN languages like F#, pattern matching can compile time check you have covered all bases as well. e.g, this won't build ```` type VariableResult = | E of string | V of string let result = V "variable" match result with | E e -> printf "was error" ``` As i haven't told it how to handle the V case for that discriminated union. So you get nice compile time checking. Ugh, how do you format code?