Re^2: building a hash from a database

Hmmm... I must admit (if it is not obvious) that there a number of things about hashes that I do not understand.

What do you mean by symbolic reference to a new hash?

I have made the change that you suggested and now I get this:

$VAR1 = {
          '' => {
                  '' => undef
                }
        };
[download]

What I need to be able to do later is to reference the has created like this:

foreach $key (keys %hash) {
    print $key, $key{'fname'}, $key{'lname'}, "\n";
}
[download]

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Re^3: building a hash from a database by bart (Canon) on May 02, 2006 at 15:44 UTC
You're still making the mistake of confusing `$rowdata->{$field}` with `$rowdata{$field}`. I fixed that in my code with an update, I admit I only spotted that later. So there was more than one thing wrong with the code. :) What do you mean by symbolic reference to a new hash? Well, first of all, you're setting the value of `$hash{$id}` to, say, 1. And then you set `$hash{$id}{'fname'}` to "foo". As a result, you really are trying to set `$1{'fname'}` to "foo". What I need to be able to do later is to reference the has created like this: `foreach $key (keys %hash) { print $key, $key{'fname'}, $key{'lname'}, +"\n"; }` [download] No way, but you will be able to use `foreach $key (keys %hash) { print $key, $hash{$key}{'fname'}, $hash{$key}{'lname'}, "\n"; }` [download]	[reply] [d/l] [select]
Re^4: building a hash from a database by bfdi533 (Friar) on May 02, 2006 at 16:20 UTC
OK, ok, ok. I think I finally understand, finally. I had tried that change from earlier and it did not make any difference at that time as I had not accounted for/changed the code to deal with the hashrefs correclty (->). I have now made both changes and it does exactly what I wanted it to. I have learned much more about hashes than I realized I did not know. Thanks (and thanks for the patience).	[reply]