Lightweight Databases

Adding Records

        Add record              S

With a plain flat text file, there's a shortcut for adding records
Adding a record at the end of the file is very cheap

        Append to beginning     S
        Append to middle        S
        Append to end           1

The code looks like this:

        sub add_user {
          my ($file, $new_user_data) = @_;
          local *F;
          open F, ">>", $file or return;
          print F $new_user_data, "\n";
        }