Count unique items in a text file using Erlang by Paolo D’Incau.
From the post:
Many times during our programming daily routine, we have to deal with log files. Most of the log files I have seen so far are just text files where the useful information are stored line by line.
Let’s say you are implementing a super cool game backend in Erlang, probably you would end up with a bunch of servers implementing several actions (e.g. authentication, chat, store character progress etc etc); well I am pretty sure you would not store the characters info in a text file, but maybe (and I said maybe) you could find useful to store in a text file some of the information that comes from the authentication server.
Unique in the sense you are thinking.
But that happens, even in topic maps.