what kind of data sturcture is this ?

[ravikim1]

I have a the following code snippet :

   foreach my $table (keys %config::db_columns)
    {
	my $select_stmt = 'select ' . lc(join(',', @{$config::db_columns{$table}}));

	$select_stmt .= " from $table";
	if ($table eq 'employeeview') { $select_stmt .= ' where present=1'; }

        my %db_data = undef;
	$sth = $dbh->prepare("$select_stmt");
	if ($sth->execute)
	{
	    my $n = 0;
	    while (my $hashref = $sth->fetchrow_hashref)
	    {
		foreach my $column (@{$config::db_columns{$table}})
		{
		    $db_data{$table}[$n]{$column} = $$hashref{$column};
		}
		$n++;
	    }
	}
    }
    print "Database upload completed.\n";

could some tell me what kind of datastucture is $db_data{$table }[$n]{$column} ?

and some insight of what does the developer intend to do ?

[numberwhun]

That is a nested Hash structure. To learn more about them via examples, check out this link.

Regards,

Jeff

[ravikim1]

Hi thanks for your reply...the link was very help ful....
also I feel that it is an hash of array of hashes.....

[numberwhun]

You are right, I missed the middle brackets. :)