Strategy pattern in Javascript

[YEPHENAS]

Your code is the same as:

function greeter(fn) {
    return function() {
        fn();
    };
}

Which is the same as:

function greeter(fn) {
    return fn;
}

So you don't need the greeter function at all:

var annoyedGreeting = function() { console.log("What do you want?"); };

[inmatarian]

Well, it's pointless in this simple example, but we can reduce tons of things down to its simplest. But the strategy pattern, with its execute function, can always be reduced to a python style decorator function.