injector.js

this.inject = function(fn) {
        return function() {
            var inject = annotate(fn);
            var callArgs = [];
            var args = Array.prototype.slice.call(arguments, 0);

            inject.forEach(function(arg) {
                if (arg.slice(0,1) === "$") {
                    callArgs.push(use[arg]);
                } else {
                    callArgs.push(args.shift());
                }
            });

            return fn.apply(this, callArgs);
        };
    };