Question

Look at the following code:

function doNotCallMe(){
    alert("Otherwise the world will be destroyed!");
}

function getNotCallable(){
    return new function() {
        alert("Attention!");
        doNotCallMe(); 
    };  
}

var not_callable = getNotCallable();

The browser shows the alerts, which it shouldn’t be. Why? How to fix?

Answer 1

return function() { ... }

is what you want instead.

All functions in JavaScript will act as object constructors when used with operator new; so you’re defining an anonymous function, and then invoking it through new.