function a(){

  console.log("a");

}

function b () {

  console.log("b");

}

function c () {

  console.log("c");

}

var injector = {

  dependencies: {},

  register: function(key, value) {

     this.dependencies[key] = value;

  },

  resolve: function(deps, func, scope) {

     var func, deps, scope, args = [], self = this;

     func = arguments[0];

     deps = func.toString().match(/^function\s*[^\(]*\(\s*([^\)]*)\)/m)[1].replace(/\s/g, '').split(',');

     scope = arguments[1] || {};

     return function() {

        var a = Array.prototype.slice.call(arguments, 0);

        for(var i=0; i<deps.length; i++) {

           var d = deps[i];

           args.push(self.dependencies[d] && d != '' ? self.dependencies[d] : a.shift());

        }

        func.apply(scope || {}, args);

     }

  }

}

injector.register("a", a);

injector.register("b", b);

injector.resolve(function (b, a, c) {

  a();

  b();

  c();

})(c);