javascript - Angularjs service typerror undefined is not a function -

i have service in coffeescript so:

app.service 'calculateservice', ->   @calculate = (student) ->     if student.type == 'maturestudent'       student.age + 10     else       student.age + 5 

js version

app.service('calculateservice', function() {   return this.calculate = function(student) {     if (student.type === 'maturestudent') {       return student.age + 10;     } else {       return student.age + 5;     }   }; }); 

and controller so:

app.controller 'marksctrl', ($scope, $filter, calculateservice, lecture) ->  **create array** $scope.students = [] angular.foreach $scope.lecture.students, (student) ->     ......   $scope.students.push(student)  **save array** $scope.savestudents = ->     angular.foreach $scope.students, (student) ->         student.points = calculateservice.calculate(student) 

js version

app.controller('marksctrl', function($scope, $filter, calculateservice, lecture) {   $scope.students = [];   angular.foreach($scope.lecture.students, function(student) {     return $scope.students.push(student);   });   return $scope.savestudents = function() {     return angular.foreach($scope.students, function(student) {       return student.points = calculateservice.calculate(student);     });   }; }); 

i keep getting "typeerror undefined not function" @ when call calculateservice.calculate , have no idea why.

i've tried , works:

$scope.savestudents = ->   angular.foreach $scope.students, (student) ->     student.points = 2 

so problem arises when call service. idea how can make work?

it looks returning function service. instead not return function, service gets newed injector attach method instance , return nothing. in original case have invoke calculateservice(student)

try:

app.service 'calculateservice', ->    @calculate = (student) ->     if student.type == 'maturestudent'       student.age + 10     else       student.age + 5    return 

i have not used coffeescript, used transpiler figure out service definition is. in times of doubts these console logging of service see outputs (in case should see function itself).