Module Explanation

var insideProps = []

var module = function(moduleName) {
  
  return {
    controller: function(controllerName, injections) {
      var scope = {};
      injections[2](scope, insideProps[0].scope);
      
      insideProps.push({
        name: controllerName,
        scope: scope
      })
    },
    service: function(serviceName, injections) {
      var scope = injections[1]();
      insideProps.push({
        name: serviceName,
        scope: scope
      })
    }
  }
}

module('firstApp')
  .service('firstService', [, function(){
    return {
      callMyName: function(name) {
        console.log(name);
      }
    }
  }])

module('firstApp')
  .controller('firstController', ['$scope', 'firstService', function($scope, FirstService) {
  $scope.sayHello = function() {
    console.log('Hello');
  }
  
  FirstService.callMyName('Weslley')
}])