Anyway to sort without rewriting main loop ?

No. You must interpolate the code given to you into the loop argument: 

foreach my $key1 ( sort {
      $hash2{$a}{key} cmp $hash2{$b}{key}
      || $a <=> $b
    } keys %hash1 ) {

[download]

The loop body can remain as it is, I guess.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re^3: hash sort by shmem
in thread hash sort by Anonymous Monk

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