Communication between wrapped code JS. Wrapping is nice if you want to use code from other projects, but sometimes that code has to communicate. So I wrote this to check if it would work the way I hoped.

observer.js

/**
 * Further reading:
 * Namespaces in JS http://www.dustindiaz.com/namespace-your-javascript/
 */


var observable = (function(){
    
    var observers = [];
    
    return {
        observe : function(o){
            // start observing this observable object
            // optional, verify 'o' has a function 'notify'
            observers.push(o);
        },
        
        unobserve : function(o){
            observers.splice(observers.index(o), 1);
        },
        
        fire_event : function(event_name){
            var i = observers.length;
            while (i--) {
                observers[i].notify(event_name);
            }
        }
    };
})();

var event_watcher = (function(){
    
    // full of functions
    var event_received = function(e){
        console.log("Eventwatcher succesfully received event " + e);
    }
    
    return {
        notify : function(e){
            event_received(e);
        }
    };
})();

// let event_watcher observe the observable
observable.observe(event_watcher);

observable.fire_event('somethinghappened');