import { from } from 'rxjs';
import { pluck } from 'rxjs/operators';
{ name: 'Joe', age: 30, job: { title: 'Developer', language: 'JavaScript' } },
//will return undefined when no job is found
{ name: 'Sarah', age: 35 }
//grab title property under job
const example = source.pipe(pluck('job', 'title'));
//output: "Developer" , undefined
const subscribe = example.subscribe(val => console.log(val));