I’ve just updated articles on Look-up tables and the list.lookup(“key”) operator used to interrogate them. Note the first of these articles lists some more nuanced/advanced use of .lookup().
To cover legacy code, I’ve also updated list.at(N) which was used with look-up tables previously to Tinderbox v8. This older code will still work, if already in use, but is now deprecated. In other words, if new to this feature or writing fresh code only use list.lookup().