print $out sort keys %old;

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Try that. As is, this would print all keys concatenated together as one string. That's fine if each key has a trailing record separator attached.

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

In reply to Re^5: Writing to File based on condition by shmem
in thread Writing to File based on condition by cbtshare

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