overview_ctrl1.coffee

#fp style
angular.module('app')
  .controller 'OverviewCtrl', [ '$scope', '$state'
    ($scope, $state) ->
 
      foo = "foo"
 
      angular.extend $scope, {
        foo
      }
]

overview_ctrl2.coffee

#oo style
class OverviewCtrl
  $inject: ['$scope', '$state']
  constructor: (@scope, @state) ->
    console.log 'OverviewCtrl initialized'
 
angular.module('app').controller 'OverViewCtrl', OverviewCtrl