Dear Monks

I want to do two types of sorting in the follwoing input data, e.g. 

Input:<test.in>

Xu, Guo Qin B-5-OR9

Zhang, Yong Ping B-5-OR10

Xu, Guo Qin B-5-OR10

Tsuneyuki, Shinji B-6-IN11

Xu, Guo Qin B-6-IN12

[download]
1st sort: Sort the names, and then combine them: 
open(IN, '<', "test.in");
open(OUT, '>', "test.out");
while (<IN>) {
  chomp;
  next unless /\S/;

  my ($name, $num) = /(.*)\s+(B-.*)/;

  $data{$name}{$num} = 1;
}

foreach my $name (sort keys %data) {
  print OUT "$name ";
  print OUT join ', ', sort { $a cmp $b } keys %{$data{$name}};
  print OUT "\n\n";
}

output:

Tsuneyuki, Shinji B-6-IN11

Xu, Guo Qin B-5-OR10, B-5-OR9, B-6-IN12

Zhang, Yong Ping B-5-OR10

[download]
2nd Sort: This is where i am having problem, now i want to sort the codes numerically inside each name, i.e. the required output is 
Tsuneyuki, Shinji B-6-IN11

Xu, Guo Qin B-5-OR9, B-5-OR10, B-6-IN12

Zhang, Yong Ping B-5-OR10

[download]
please help me in doing this.

best regards,
raj

In reply to difficulty in multi sorting by texuser74

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