Looks like you need a sort function or block and to keep the previous (sorted) case in an up-scope variable, e.g.
my $prevCase = '';
for my $i (sort caseThenId (0..$#$var1) {
my $case = $var1->[$i]{case};
print "$case:"\n" if $case ne $prevCase;
$prevCase = $case;
print $var1->[$i]{id} . ") "
. $var1->[$i]{name} . ", "
. $var1->[$i]{degree} . "\n";
}
sub caseThenId {
$var1->[$a]{case} cmp $var1->[$b]{case}
or $var1->[$a]{id} cmp $var1->[$b]{id};
}
Update: $var1 should be a reference to your array in the above example.
