1. Callbacks #

Created Monday 15 November

Definiton of a callback #

When a function takes in another function as argument and runs it when a certain condition is met. This function passed as argument is called a callback function.

Problems with using callback functions #

1. Code becomes ugly and unmanageable. Like a Pyramid, of “doom”.

movePlayer(100, 'Left', function() {
	movePlayer(400, 'Left', function() {
		movePlayer(10, 'Right', function() {
			movePlayer(330, ‘'Left', function() {
			});
		});
	});
});

2. Error handling is also very difficult, as more indented try-catch blocks will be needed, for each callback.

Conclusion #

Callbacks are good for short tasks, but not for long asynchronous tasks.