Here is my hot-take, rather than what to master, what not to even bother with. That's MongoDB. There is no use case for that DB that can't be quickly replaced by a good DB such as Postgres.
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
Here is my hot-take, rather than what to master, what not to even bother with. That's MongoDB. There is no use case for that DB that can't be quickly replaced by a good DB such as Postgres.