Yes,its much more powerful, the way you said, but in my case it won't be
necessary or important.
Here I guess, I gave a wrong example where the data can be changed.
Lets assume, the hash of hash being a record of something which has already
happened and hence we know the final value, not something which is right now
happening, i.e changeable.
In my case, its like
$Position{$Scrip}{$Date}= #some value
That is, my position in a previous date $Date, in the stock $scrip, was some
integer. Thanks for the correction, regarding the brackets. I stand corrected
and it seems I have made a lot of such mistakes apparent in the previous two
three mails.
Soham
________________________________
From: Thomas Bätzler <t.baetz...@bringe.com>
To: beginners@perl.org
Cc: Soham Das <soham...@yahoo.co.in>
Sent: Tuesday, 29 September, 2009 3:46:28 PM
Subject: AW: Hash of Hashes
Soham Das <soham...@yahoo.co.in> asked:
> How can I create a Hash of Hashes from two lists. Is it possible?
>
> I want the effective functionality to be served like this
>
> $ChildHash["Joe"]["21A"]="Sally"
>
> i.e Joe at 21A has a child called Sally. List1 here will be the name of
> Parents, List2 here will contain the house number.
Please keep in mind: square brackets are for arrays/lists. Curly brackets are
for hashes.
In any case, wouldn't it be smarter to organize your data differently?
I.e.:
%parent = ( 'Joe' => { 'address' => '21A', children => ['Dick','Sally'] } );
To add another child to an existing parent you'd then say
push @{$parent{'Joe'}{'children'}}, 'Jane';
To add a new parent:
@{$parent{'Sven'}}{'address','children'} = ( '9b', ['Bjorn'] );
HTH,
Thomas
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