I'm not sure what you're really trying to achieve with this, but let's make sure you know how arrays get assigned to hashes.

my @array = (1, 2, 3, 4, 5, 6);
my %hash = @array;
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Is the same as saying:

my %hash = ( 1 => 2, 3 => 4, 5 => 6 );
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apart from not having an @array floating around in the second version of course. If you really want to get each non-empty line in your input file into a hash with a key that's generated by some iterative process, you want something like

open my $file, '<', $filename or die "Unable to open '$filename': $!";
my %edit;
for (<$file>) {
  next if //;
  chomp;
  # Some code to get a $key with an appropriate value
  $edit{$key} = $_;
}
close $file;
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