Ok, Roboticus and Moritz, thanks for the tips. I get it now ;-) I'm really getting into the more functional aspects of Perl's map as a transformative helper! 

my %alertlog_mapper = map { $_->[1] => [ $_->[3], $_->[4], $_->[6], $_
+->[2], $_->[5] ] }
          sort { Date_Cmp($a->[2], $b->[2]) }
          map 
          {
            my @logline = ();
            my ($msg_id, $timestring, $min, $sec, $secs, $secs_before,
+ $secs_after);
            @logline = split(/\s+/, $_, 5);
            $timestring = $logline[0] . ' ' . $logline[1];
            $min = substr($logline[1], 3, 2);
            $sec = substr($logline[1], 6, 2);
            $secs = $min * 60 + $sec;
            $secs_before = $secs - 5;
            $secs_after = $secs +5;
            #my @lookup_alerts = &
            $msg_id = $logline[3];
            [ $_, $logline[3], ParseDate($timestring), $logline[0], $l
+ogline[1], $logline[2], $logline[4] ];
          } @gmsgs;

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I'll keep up with the perldocs and keep working on perl data structures, as time permits.

In reply to Re^2: Using map to convert an array into a hash of array of arrays by rjoost
in thread Using map to convert an array into a hash of array of arrays by rjoost

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