function.service.ts

import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';

import { FunctionComponent } from './function.component';

@Injectable()
export class FunctionService {

  constructor(public http: Http) { };

  getFunctions() {
    return this.http.get("/listFuncaoAll")
              .map( (res:Response) => res.json());
  }

}