Interview: filter() active tickets

From a stream of tickets, keep only status === "open" and log their ids.

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const { from, filter, map } = Rx;

const tickets = [
  { id: 'T1', status: 'open' },
  { id: 'T2', status: 'closed' },
  { id: 'T3', status: 'open' },
];

const result$ = from(tickets).pipe(
  filter(ticket => ticket.status === 'open'),
  map(ticket => ticket.id)
);

result$.subscribe(value => console.log(value));

script.ts // TypeScript

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