SPUG: Trouble using a hash

[Peter Darley]

Keith,
	Data Dumper rocks, but don't you need to pass it a scalar? Like print
Dumper(\%trackCircuit)?
Thanks,
Peter Darley

-----Original Message-----
From: spug-list-bounces at mail.pm.org
[mailto:spug-list-bounces at mail.pm.org]On Behalf Of
keith.reed at philips.com
Sent: Wednesday, November 19, 2003 6:17 PM
To: spug-list at mail.pm.org
Subject: Re: SPUG: Trouble using a hash


I like to use Data::Dumper to assist my debugging of hashes.

in the debugger type
x use Data::Dumper;
x print Dumper(%trackCircuit)


You'll get a nicely formatted dump of the hash that might provide some clues
as to where you're going wrong.

Keith






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                                                    cc:   (bcc: Keith
Reed/ATL-BTL/MS/PHILIPS)
                                                    Subject:    SPUG:
Trouble using a hash

               "Curtis Lacy"                        Classification:
               <cel1 at ix.netcom.com>

               Sent by:
               spug-list-bounces at mail.pm
               .org

               11/19/2003 05:47 PM






Simple question which I hope someone will take the time to answer. I am
doing a little Perl script to do some studies of thoroughbred horse racing
(what an original idea!).  One thing I need to know is when a previous race
was on the same track or on the
same track circuit.  [For example, Santa Anita, Hollywood Park, and Del Mar
are all considered to be in the Southern California circuit.]

So I have a hash defined and initialized as follows:

my %trackCircuit = ( Hol=>'SoCal', Aqu=>'NYRA' );

just to give a short sample.

There is an array of items, @LR, which describes the last race run by the
horse.  The track is in the first spot, $LR[0].

In the debugger, when I try to step through a line which has a term like
$trackCircuit{  $LR[0] }, it complains about an uninitialized value.  I get
the same squawk if I try to do it from the debugger:

p $trackCircuit{ $LR[0] }

Yet, when I do

p $LR[0]

it gives me the correct string "Hol", and if I try

p $trackCircuit{ "Hol" }

it gives the expected "SoCal".

I am at a loss to know what to try next.

Curtis Lacy
cel1 at ix.netcom.com


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