I might have been a touch confused as to what you were asking. Adding this 

  elsif(ref($ref) eq '') { 
      $sub1->('',''); 
      print 'undef'; 
      } # scalar

[download]
before 
if ($lastc){

[download]
prints all scalars as undef. 
$hash={1AoH=>[{h1=>{a=>undef}
              },
              {h2=>{a=>undef}
              },
              {h3=>{a=>undef}
              }
             ],
       2Aoa=>[[undef,
               undef,
               undef
              ],
              [undef,
               undef,
               undef
              ]
             ],
       3AoAoH=>[[{2=>undef,
                  a=>undef
                 },
                 {2=>undef,
                  a=>undef
                 },
                 {axx=>{a=>undef}
                 }
                ]
               ],
       4HoHoA=>{a11=>[{h111=>{a=>undef}
                      },
                      {h211=>{a=>undef}
                      },
                      {h311=>{a=>undef}
                      },
                      undef
                     ],
                a22=>[{h122=>{a=>undef}
                      },
                      {h222=>{a=>undef}
                      },
                      {h322=>{a=>undef}
                      },
                      undef
                     ]
               },
       5HoH=>{a411=>{h1111=>{a=>undef},
                     h4112=>{h41121=>{a=>undef}
                            },
                     h4113=>{h41131=>{a=>undef}
                            },
                     h4114=>undef
                    },
              a422=>{h422a=>{a4222=>{h42221=>{a=>undef}
                                    },
                             a4223=>{h42231=>{a=>undef}
                                    },
                             h4221=>{a=>undef,
                                     b=>undef
                                    }
                            },
                     h422b=>undef
                    },
              a433=>{a=>undef,
                     b=>undef,
                     c=>undef
                    }
             },
       Clean=>{extra=>{}},
       Domains=>{},
       Lists=>{Body=>{RedactedWordList=>{weight=>undef,
                                         words=>{word1=>undef,
                                                 word2=>undef
                                                },
                                         words_found=>[]
                                        }
                     }
              },
       Words=>{},
       flags=>{Redacted=>undef,
               Redacted2=>undef,
               Redacted3=>undef,
               Redacted4=>undef,
               example=>undef,
               font_attributes=>{colors=>undef,
                                 size=>undef
                                },
               font_changes=>{colors=>undef,
                              size=>undef
                             }
              },
       other_results=>{},
       recipient_list=>[undef],
       removed_results=>[undef,
                         undef,
                         undef
                        ],
       result=>undef
      };

[download]

In reply to Re^2: Traversing a hash of hashes of hashes by huck
in thread Traversing a hash of hashes of hashes by kcorj2244

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.