What is the right way to wire together 2 javascript objects?

Question

I\'m currently facing a conundrum: What is the right way to wire together 2 javascript objects?

Imagine an application like a text editor with several different fi

Answer 1

Thanks for the insight. I ended up writing a simple JavaScript dependency injection utility. After debating for a while and your comments, it occured to me that DI was really the right answer because:

1. It totally separated the concerns of wiring from the business logic while keeping the wiring logic close to the things being wired.
2. It allowed me to generically provide a "you're all wired up" callback on my objects so that I could do a 3 phase initialization: instantiate everything, wire it all up, call everyone's callbacks and tell them they're wired.
3. It was easy to check for dependency missing problems.

So here's the DI utility:

var Dependency = function(_name, _instance, _dependencyMap) {
    this.name = _name;
    this.instance = _instance;
    this.dependencyMap = _dependencyMap;
}

Dependency.prototype.toString = function() {
    return this.name;
}

CONCORD.dependencyinjection = {};

CONCORD.dependencyinjection.Context = function() {
    this.registry = {};
}

CONCORD.dependencyinjection.Context.prototype = {
    register : function(name, instance, dependencyMap) {
        this.registry[name] = new Dependency(name, instance, dependencyMap);
    }, 
    get : function(name) {
        var dependency = this.registry[name];
        return dependency != null ? dependency.instance : null;
    },

    init : function() {
        YAHOO.log("Initializing Dependency Injection","info","CONCORD.dependencyinjection.Context");
        var registryKey;
        var dependencyKey;
        var dependency;
        var afterDependenciesSet = [];
        for (registryKey in this.registry) {
            dependency = this.registry[registryKey];
            YAHOO.log("Initializing " + dependency.name,"debug","CONCORD.dependencyinjection.Context");

            for(dependencyKey in dependency.dependencyMap) {
                var name = dependency.dependencyMap[dependencyKey];
                var instance = this.get(name);
                if(instance == null) {
                    throw "Unsatisfied Dependency: "+dependency+"."+dependencyKey+" could not find instance for "+name;
                }
                dependency.instance[dependencyKey] = instance; 
            }

            if(typeof dependency.instance['afterDependenciesSet'] != 'undefined') {
                afterDependenciesSet.push(dependency);
            }
        }

        var i;
        for(i = 0; i < afterDependenciesSet.length; i++) {
            afterDependenciesSet[i].instance.afterDependenciesSet();
        }
    }

}