my $ref = hoa2aoh($HoA);
print Dumper $ref;
[download]

$VAR1 = [
          {
            'flintstones' => undef,
            'jetsons' => 'george'
          },
          {
            'flintstones' => undef,
            'jetsons' => 'jane'
          }
        ];
[download]

I had an error in the argument to glob, repaired as noted above.

The superfluous variable was $hoh in the line

    my ($hoa, $hoh) = shift;
[download]

That doesn't really involve two arguments - the shift only brings in one value, and $hoh remained undefined and unused. I only thought I'd want it at first, and piggybacked its declaration on the arg line.

After Compline,
Zaxo

Dear Zaxo,
One last thing here. I'm really sorry for not being precise earlier. I was just trying to pose the problem as simple as possible. The element of the array in my actual production code comes with white space like this:

my $HoA = {
            '1,2,flintstones' => [ "fred-1 foo-2", "barney-1 bar-2" ],
            '2,3,jetsons'   => [ "george-1 foo-2", "jane-1 bar-2"],
      };
[download]

The key of the new hash is identified correctly, the problem is only in the values. Is there a way I can modify your code? In particular, so that it takes the element of the array as "one" entity regardless the white-space?
So that it doesn't return:

$VAR1 = [
          {
            '1,2,flintstones' => undef,
            '2,3,jetsons' => undef
          },
          {
            '1,2,flintstones' => 'jane-1',
            '2,3,jetsons' => 'foo-2'
          },
          {
            '1,2,flintstones' => undef,
            '2,3,jetsons' => 'bar}'
          },
          {
            '1,2,flintstones' => 'barney-1',
            '2,3,jetsons' => 'foo-2'
          },
          {
            '1,2,flintstones' => undef,
            '2,3,jetsons' => 'bar-2}'
          }
        ];
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But simply:

my $AoH = [

              {
                '1,2,flinstones' => "fred-1 foo-2",
                '2,3,jetsons'    => "george-1 foo-2"
              },
              {
                '1,2,flinstones' => "fred-1 foo-2",
                '2,3,jetsons'    => "jane-1 bar-2"
              },
              {
                '1,2,flinstones' => "barney-1 bar-2",
                '2,3,jetsons'   => "george-1 foo-2"
              },
              {
                '1,2,flinstones' => "barney-1 bar-2",
                '2,3,jetsons'    => "jane-1 bar-2"
              },

];
[download]

I tried to modify your code by changing the type of separator. But doesn't work either. Hope to hear from you again.


---
neversaint and everlastingly indebted.......