Its actually hard for me to understand how this code prints anything sensible at all. I just added white-space and comments. Something is a bit bizarre here.

Update: Anyway $Account{"0"} is a reference to a hash. The purpose of this is to create a new hash and "take out one level of hash key" which is a reference. $Account{$i}{$key} should be a scalar and likewise $TAccount{$key} should be a scalar - the {$i} keys are "gone". I still think something is a bit weird with the code below, but I think I grok the idea of what is supposed to happen. 

print "\nB:Acct:    ",\%Account,"\t",\$Account{"0"},"\t",
       \$Account{"1"},"\t",\$Account{"10"},"\n";
#######      
{   #I'm guessing this is a typo ????
#######
   my %TAccount = (); 
   keys( %TAccount ) = $i;
   foreach my $key ( keys %{ $Account{$i} } )
   {  
       $TAccount{$key} = $Account{$i}{$key}; 
   }
   print "A:TAcct1:  ",\%TAccount,"\t",\$TAccount{"0"},
                     "\t",\$TAccount{"1"},
                     "\t",\$TAccount{"10"},"\n";
    
   print "\nB:Acct:    ",\%Account,"\t",\$Account{"0"},
                       "\t",\$Account{"1"},
                       "\t",\$Account{"10"},"\n";
   {  
       #### this does nothing!!! #####
       #### except hide the previous %TAccount
       my %TAccount = %{ $Account{"$i"} 
   };
   
   print "A:TAcct2:  ",\%TAccount,"\t",\$TAccount{"0"},
         "\t",\$TAccount{"1"},
         "\t",\$TAccount{"10"},"\n";

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In reply to Re^3: How best to replicate/copy a hash of hashes by Marshall
in thread How best to replicate/copy a hash of hashes by flexvault

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