Basic Namespacing/Sandboxing System

gistfile1.js

(function(){
    var n$,
        decorate,
        expand,
        libraries = [],
        set_libraries;

    n$ = function(cb){
        if(cb.apply) {
            cb.apply(n$,libraries);
        }
        return n$;
    }

    set_libraries = function() {
        if( arguments.length > 0 ) {
            libraries = arguments;
        }
        return libraries;
    };

    decorate = function(name,value) {
        var i;
        if( arguments.length > 1 ) {
            this[name] = value;
        }
        else {
            for(i in name) {
                this[i] = name[i];
            }
        }
    };

    expand = function(name){
        var i, that = this;

        if( name && !(name in that) ) {
            this[name] = function(cb){
                if(cb.apply) {
                    cb.apply(that[name],libraries);
                }
                return that[name];
            };

            this[name]['expand'] = function(){return expand.apply(that[name],arguments);};
            this[name]['decorate'] = function(){return decorate.apply(that[name],arguments);};
        }

        return this[name];
    };

    n$['expand'] = function(){return expand.apply(n$,arguments);};
    n$['decorate'] = function(){return decorate.apply(n$,arguments);};
    n$['libs'] = set_libraries;

    this['n$'] = n$;
})();