ng_provider_example.js

(function() {

'use strict';
angular.module('app')
  .provider('AppExampleService', AppExampleServiceProvider);



function AppExampleServiceProvider() {
  var state = {};
  return {
    $get: _$get
  }

  function _$get() {    
    return {
      sayHello: sayHello
    }

    function sayHello() {
      return 'hello';
    }
  }

}