Injecting Underscore.js into Angular Controller

Question

I tried two of the solutions here to no avail.

This is my Error:

angular.js:68 Uncaught Error: [$injector:modulerr] Failed to instantiate module flavorApplication due to: Error: [$injector:unpr] Unknown provider: underscore

Here is my code for the module:

var underscore = angular.module('underscore', []);
underscore.factory('_', ['$window', function() {
  return $window._;
}]);

Here is my App Config:

(function(){
  angular.module("flavorApplication",
    ['ui.bootstrap',
        'ui.router',
        'angular-loading-bar',
        'angular-confirm',
        ]);
        angular.module("flavorApplication").config(['$stateProvider', '$urlRouterProvider', '$locationProvider', 
        'underscore', function ($stateProvider, $urlRouterProvider, $locationProvider, underscore){

Here I'm trying to inject it into a Controller (probably where I'm going wrong)

(function () {
    'use strict';

    angular
        .module('flavorApplication')
        .controller('UsedSearchesController', UsedSearchesController);

    UsedSearchesController.$inject = ['$stateParams', '$state', 'DataService', '_'];
    function UsedSearchesController($stateParams, $state, DataService, _) {
        var vm = this;
        vm.currentSearches = $stateParams.search.split("|")


        activate(vm);

        ////////////////

        function activate(vm, _) {
            vm.removeSearch = function (searchTerm) {
              $stateParams.search =  _.filter(vm.currentSearches, 
              function(search){return search !== searchterm}).join("|")
                $state.go('home');
            }
        }
    }
})();

Answer 1

You missed $window dependency to inject in your factory

underscore.factory('_', ['$window', function($window) {

Other thing you can't get factory/service singleton object to be avail at config phase of angular, you can't get that object there.

//remove 'underscore' dependency from config phase like below.
angular.module("flavorApplication").config(['$stateProvider', '$urlRouterProvider', '$locationProvider',
   function ($stateProvider, $urlRouterProvider, $locationProvider){

Additionally, you don't need to add _ as a parameter in activate function,

function activate(vm) { //<-- remove _ from here

Don't forget to inject underscore module to flavorApplication module so that would make available _ object throughout application modules & components.

angular.module("flavorApplication",
['ui.bootstrap',
    'ui.router',
    'angular-loading-bar',
    'angular-confirm',
    'underscore' //<-- added underscore module here
]);