typescript - Migration from Angular2 beta1 to Angular2 beta15 - .map() error -

i'm trying migrate project angular2 beta1 angular2 beta15 , have issues.

i have error message : 'map' property not exists on 'observable< response >'

example of code error :

import { injectable } 'angular2/core'; import { http, response, headers } 'angular2/http'; import { observable } 'rxjs/observable'; import { helpermodule } './helpers.module'; import { blogpost } './model'; import 'rxjs/add/operator/map';  /**  * service dealing blog data  */ @injectable() export class dataservice {      constructor(private http: http) { }      /**      * call api list available blog posts      */     listblogposts() {         return this.http.get(helpermodule.urlbuilder.buildpostlisturl()).map(res => (<response>res).json());     }  } 

code available here : https://github.com/adrientorris/aspnet5angular2playground

edit : i'm using rxjs 5.0.0-beta6 , typescript 1.8.10, targetting es6

try using latest version of typescript (1.9) compile code. module augmentation bugged in minor versions of ts 1.8. rxjs changed way defines modules after 5.0.0-beta2.

you can try nightly build using: npm install -g typescript@next