title: How to call a function from another module
body: <p>In my angularJS application, I have two modules : module A and module B.</p>
  
  <pre><code>angular.module('A').controller('ACtrl',function($scope){
      $scope.alertA = function(){alert('a');}
      //...
  });
  
  angular.module('B').controller('BCtrl',function($scope){
      //...
  });
  </code></pre>
  
  <p>How to call the function <code>alertA</code> in the module B ?</p>