foo.js

(function() {
  var app = angular.module('apptui');

  app.service('BonjourService', ['$timeout', '$rootScope', function($timeout, $rootScope) {
    var service = {
      computers = [],

      browse: function() {
        //return it (timeout returns a promise)
        return $timeout(function() {
          Bonjour.browse(
            '_apptui-http._tcp',
            'local',
            foundNewComputer,
            lostComputer
          );
          return computers;
        }, 1000);
      }
    };

    var foundNewComputer = function(newComputer) {
      service.computers.push(newComputer);
      console.log(this.computers);
    };

    var lostComputer = function(computer) {
      console.log(computer);
    };

    return service;

  }]);
})();