Function in javascript that can be called only once

once.js

// Function in javascript that can be called only once
// See e.g : http://davidwalsh.name/javascript-once
//           http://stackoverflow.com/questions/12713564/function-in-javascript-that-can-be-called-only-once
function once(fn, context) { 
    var result;

    return function() { 
        if(fn) {
            result = fn.apply(context || this, arguments);
            fn = null;
        }
        return result;
    };
}


(function() {
    var canOnlyFireOnce = once(function() {
        console.log('Fired!');
    });

    canOnlyFireOnce(); // "Fired!"
    canOnlyFireOnce(); // nada
}());