use Sort::Key qw(ikeysort);

my @sorted_keys =
  ikeysort { length ( (%{$HoHoA{$_}})[0] ) } keys %HoHoA;

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In reply to Re: Sorting HoHoA based on Length of Second Key by salva
in thread Sorting HoHoA based on Length of Second Key by Anonymous Monk

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