Well, it's all in the sort sub.
# Sort a list of building ids alpha by name
@sorted_ids = sort {$data_struct{$a} cmp $data_struct{$b}} keys(%data_
+struct);
The date issue is a little tougher, I recommend turning the date into unix time and sorting numerically.
Use the Time::Local module's timelocal command to do the conversion. The exact code will vary depending on your date representation.
$time = timelocal( $sec, $min, $hours, $mday, $month, $year)
Note that the year representation is like that of time(), so subtract 1900 from the year, eg 2001 = 101.
TGI says moo
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