See how to use the variable $/ in perlvar to change Perl understanding of what a line is. For your particular case just use... 
$/ = "\n\n";

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before the loop.

In reply to Re^3: How to eliminate redundancy in huge dataset (1,000 - 10,000) by salva
in thread How to eliminate redundancy in huge dataset (1,000 - 10,000) by Kenin

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