Yes —> OBJECT into an ARRAY !!! CORRECT!
RESULT → OBJECT-ARRAY
—> [{data:‘tt’},{data:‘ff’},{data:‘dd’},{data:‘aa’}]
But the same way you can put the ARRAY again into an OBJECT, You can do this infinite.
Also works vice versa. → Will depend on your data and how you want to store it inside database. As i already said, you first have to structure your database, before you start to code. Make clear → how your database will look like at the end.