Rx - Map

getData(id : number) : Observable<Post> {
    return this.http.get(${this.requestUrl}/${id})
      .map(this.mapResponse)
      .catch(this.handleError)
  }


  mapResponse(response : Response) : Post {
    return response.json();
  }

The map() function takes in a lambda function or a reference to a function that will execute the procedure and return the mapped result.
Accepts (res : Respone) and returns a result.

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HTTP General