To map and filter an array at the same time with JavaScript, we use the flatMap method.
For instance, we write
const names = options.flatMap((o) => (o.assigned ? [o.name] : []));
to call options.flatMap with a callback that checks if o.assigned is set.
If it is, then we array with o.name inside.
Otherwise, we return an empty array.
And we use flatMap to combine them into one flattened array.
