Looks to me like you want something like this Schwartzian Transform:

#open your files as before, then
print FOO map { $_->[1] }
          sort { $a->[0] <=> $b->[0] }
          map {my @F=split; [substr($F[2],1), $_]}
          <D>;
#close your files as before
[download]

Reading from bottom to top, we construct an array of arrays, where the first element of each element is the sort-field, and the second is the print-field. Then we sort by comparing the sort fields, then we return only the print-fields to print.

Updated to work on the data provided.

---

In reply to Re^3: sort using <=> by Roy Johnson
in thread sort using <=> by drock

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