Hi everyone,

Say you had an unknown hash structure and you didnt know how many dimensions to it there were. By dimension I mean child hashes, so it could be HoH, HoHoH, HoHoHoH, and so on, you just dont know.

How would you traverse this hash to print out all key => value pairs. The only way I know how is a series of for loops, however that would mean you have to know in advance how deep it goes. 

   for my $k1 ( sort keys %{ $self->{"_dataSymbols"} } ) 
   {
      print "$k1\n";

      for my $k2 ( sort keys %{ $self->{"_dataSymbols"}->{ $k1 }} ) 
      {
         print "\t$k2\n";

         for my $k3 ( sort keys %{ $self->{"_dataSymbols"}->{ $k1 }->{
+ $k2 } } )
         {
            print "\t\t$k3\n";

            for my $k4 ( sort keys %{ $self->{"_dataSymbols"}->{ $k1 }
+->{ $k2 }->{ $k3 } } )
            {
               print "\t\t\t$k4\n";

               for my $k5 ( sort keys %{ $self->{"_dataSymbols"}->{ $k
+1 }->{ $k2 }->{ $k3 }->{ $k4 } } )
               {
                  print "\t\t\t\t$k5\n";

                  for my $k6 ( sort keys %{ $self->{"_dataSymbols"}->{
+ $k1 }->{ $k2 }->{ $k3 }->{ $k4 }->{ $k5 } } )
                  {
                     print "\t\t\t\t\t$k6 => %{ $self->{"_dataSymbols"
+}->{ $k1 }->{ $k2 }->{ $k3 }->{ $k4 }->{ $k5 } }\n";

                  }
               }
            }
         }
      }
   }

[download]
Any help is greatly appreciated, thanks in advance, Mich.

In reply to Traverse an unknown multi-dimensional hash by Anonymous Monk

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