This is the basic idea of what I'd do: 

my $count = 0;
while (<IN>) {
  s/^"\d+"$/'"' . ++$count . '"'/e;
  print OUT;
}

[download]
...or, from the command line 
% perl -i.bak -pe 's/^"\d+"$/q(").++$count.q(")/e' myfile

[download]
The one-liner puts the original file in myfile.bak.

the lowliest monk

In reply to Re: Re-ordering data in data file by tlm
in thread Re-ordering data in data file by Lhamo_rin

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