sub desc_sort_subject {
$b <=> $a; # Numeric sort descending
}
sub asc_sort_subject{
$a <=> $b; # Numeric sort ascending
}
%courses = (
"101" => "I",
"221" => "L",
"300" => "A",
"102" => "P",
"103" => "P",
"200" => "L",
);
foreach $key (sort asc_sort_subject(keys(%courses))) {
printf "\t%-5d%s\n", $key, $courses{"$key"};
}
foreach $key (sort desc_sort_subject(keys(%courses))) {
printf "\t%-5d%s\n", $key, $courses{"$key"};
}
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