Ceylon: Higher order functions

	class Coordinate(x, y) {
	shared Integer x;
	shared Integer y;
	shared actual String string => "Coordinate(``x``,``y``)";
	}
	class Car(shared String name, position) {
	shared variable Coordinate position;
	shared void moveUp() => position = Coordinate(position.x, position.y + 1);
	shared actual String string => "``name`` located at ``position``";
	}
	void repeat(Integer times, Anything action()) {
	for (i in 1..times) {
	action();
	}
	}
	/**
	this demo prints
	car1 located at Coordinate(5,20)
	car1 located at Coordinate(5,30)
	car2 located at Coordinate(0,40)
	car2 located at Coordinate(0,50)
	**/
	void higherorder_demo() {
	Car car1 = Car("car1",Coordinate(5,20));
	print(car1);
	//now we can move our car 10 times up like this
	for (i in 1..10) {
	car1.moveUp();
	}
	print(car1);
	//or we just call the higher order function repeat
	Car car2 = Car("car2",Coordinate(0,40));
	print(car2);
	repeat(10, car2.moveUp);
	print(car2);
	}

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