How data.table sorts strings when setting key

Question

Yesterday I had to spend some time trying to find a bug in my code and I found that data.table package sorts strings in a way a bit different from base. Is this

Answer 1

Well, I am not sure what the most efficient way is but you can do the following to reproduce the data.frame result.

dt[order(dt$cn)]

           cn
1:     Ubuntu
2:        USA
3: Uzbekistan