Exemplo de uma função em um controller em ng 1.6

angular.controller.js

function ListController ( Service, $mdDialog ) {
    const vm = this;
    vm.list = true;
    vm.MODULE_NAME = MODULE_NAME;
    vm.PATH = MODULE_NAME.toLowerCase();

    const hiddenFields= [
        'active'
      , 'password'
      , 'automaticLogin'
      , '__v'
      , 'created_at'
      , '$$hashKey'
    ]

    const toObject = ( acc, cur ) => Object.assign( {}, acc, cur )

    const toFinalObject = ( arr ) => arr.reduce ( toObject, {} )

    const removeFieldsFromSchema = ( hiddenFields ) => 
      ( obj ) => ! hiddenFields.includes( obj.name )

    const removeHiddenFields = ( hiddenFields ) => ( obj ) => {

      const alloweds = ( field ) => ! hiddenFields.includes( field )
      const allowedFields = Object.keys( obj ).filter( alloweds )

      return allowedFields.map( field => ( { [field] : obj[field] } ))
    }

    const success = ( list ) => 
      vm.list = list.data
                    .map( removeHiddenFields( hiddenFields ) )
                    .map( toFinalObject )
    
    const successSchema = ( caught ) => {
      vm.SCHEMA = caught.data
                        .filter( removeFieldsFromSchema( hiddenFields ) )

      return Service.list()                    
    }

    Service.getSchema()
            .then( successSchema )
            .then( success )
            .catch( error )



    vm.editDialog = function ( ev, obj ) {
      ev.preventDefault();
      $mdDialog.show({
        controller: EditDialogController,
        controllerAs: 'vm',
        templateUrl: 'app/modules/User/views/form.html',
        parent: angular.element(document.body),
        targetEvent: ev,
        clickOutsideToClose: true,
        fullscreen: false,// Only for -xs, -sm breakpoints.
        locals: { obj }
      })
      .then(function(answer) {
        console.log('then', answer);
      }, function() {
        console.log('finish')
      });
    };
  }
  ListController.$inject = [`${MODULE_NAME}Service`, `$mdDialog`];