Map doesn't exist on Observable<Object> with angular 6.0.0 and rxjs 6.1.0

In rxjs@6 you can use from as standalone function:

import { from } from 'rxjs';

See also migration to rxjs6 guide

https://github.com/ReactiveX/rxjs/blob/master/docs_app/content/guide/v6/migration.md#import-paths

UPDATE

You need to switch to pipe syntax, make sure you import all operators used from rxjs/operators. For example:

import { map, filter, catchError, mergeMap } from 'rxjs/operators';

DOCUMENTATION

pipe is a method on Observable which is used for composing operators

Here is the way how you can use the new method pipe() in Version 6:

loadProducts() {
    return this.http.get("/api/products").
        pipe(
           map((data: any[]) => {
             this.products = data;
             return true;
           }), catchError( error => {
             return throwError( 'Something went wrong!' )
           });
        )
}

Keep in mind that with Version 6 you should now use catchError and throwError instead of:catch and throw. Here is the correct import with Version 6:

import { Observable, of, throwError, ...} from "rxjs"

import { map, catchError, ...} from "rxjs/operatros"

You have to change to pipe syntax:

import { Http  } from '@angular/http';
import { Injectable } from '@angular/core';
import {map, catchError} from "rxjs/operators";

import { Observable, throwError } from 'rxjs';

list():Observable<any>{
    return this.http.get(this.url)
    .pipe(
      map((e:Response)=> e.json()),
      catchError((e:Response)=> throwError(e))
    );
  }