I am beginner in RxJs, please advice me how to transform a list of objects in a list of its names, like here:
import { map } from 'rxjs/operators';
var names = this.http.get<Project[]>('/api/projects').pipe(map(p=> p.name));
it says name does not exist on the Project[]...
It's a valid error since p in your code is an array. To achieve what you want use map method:
this.http.get<Project[]>('/api/projects').pipe(
map(projects => projects.map(project => project.name))
);
map oprator is not iterating through your Projects array. It stands between observable stream value and returns what you mutate or want with data . So you need to perform a js map inside Map oprator to mutate data to what you want
var names = this.http.get<Project[]>
('/api/projects').pipe(map(projects=> projects.map(p=> // whatever you wana do)))
