https://github.com/Rdatatable/data.table/blob/21eec50d7309adcaea1efbba973e31de10955bd4/NEWS.md says, under v1.10.2,
options('datatable.WhenJisSymbolThenCallingScope') is now removed
but the FAQ (item 1.5) says
In v1.9.8 released Nov 2016 there is an ability to turn on new behaviour: options(datatable.WhenJisSymbolThenCallingScope=TRUE). It will then work as you expected, just like data.frame. If you are a new user of data.table, you should probably do this. You can place this command in your .Rprofile file so you don’t have to remember again.
I don't know if it's just been left in the FAQ by mistake, or if I'm misunderstanding something.
https://github.com/Rdatatable/data.table/blob/21eec50d7309adcaea1efbba973e31de10955bd4/NEWS.md says, under v1.10.2,
but the FAQ (item 1.5) says
I don't know if it's just been left in the FAQ by mistake, or if I'm misunderstanding something.