The navigation is self-managed too, and is handled by PreciSense LiDAR and obstacle detection sensors. This allows the robot vacuum to map your home, helping it to avoid objects like cables and toys.
Your own functions can work with @ too. Let’s reduce the temperatures with our max function to find the hottest temperature.
，这一点在PDF资料中也有详细论述
Note though that the actual cached values are serialized Ruby objects stored as BLOBs, so you can’t easily view/decode them outside of the Rails console.
WHERE message_fts @@ q