JavaScript: How to pass an anonymous function as a function parameter?

Question

I would like to write a function that accepts an anonymous function as a parameter. For example:

run('param1', function(){
    alert('execute this');
});

function run(param1, callback) {
    //now execute the callback parameter as a function
}

How can I achieve something like this?

Answer 1

callback() would invoke it.

If you need to supply a context, do callback.apply(this, arguments). When you use .apply be aware of the current execution context, basically know what this will refer to, or your code will not work as expected if you are feeding a literal that references this inside it's function body.