use strict;
use warnings; 
my %hash = ( doc1 => 2345,
      doc2 => 1234,
      doc3 => 5678,
      doc4 => 4567,
      );
my @sorted_docs = sort { $hash{$a} <=> $hash{$b} } keys %hash;
print join " " => @sorted_docs;
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• See the correct representation of your hash.
• Look around. There are some valuable resources. Read QandASection: sorting and How do I sort a hash by its values?.

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