Recent assignment: Log analyzer

• The assignment
• gbn's tricks:
  1. Ignore "still logged in" lines: we don't know when they logged out; don't know when the log was generated, so can't include their statistics
  2. Put each line into an array. Group the arrays by username (since we like to report by-user stats). Thus, the main datastructure is a hash (usernames) of arrays (log lines), or HoA from man perldsc
  3. Transform all times into minutes; translate months into month numbers (for sorting); skip unwanted fields.
  4. Start by looking at the required input/output, rather than from all possible things you might do with the logfile.