spstansbury has asked for the wisdom of the Perl Monks concerning the following question:

I need to run a script and output some data to be used at a later time. Subsequent running of the script will use the stored data as baseline values to compare against new data.

I'm using Storable:

push @{$baseline}, \%base_record;
    
store( \$baseline, $baseline_records ) or die "Can't store %a in $base
+line_records!\n";

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%base_record has a number of key/value pairs and gets pushed onto @{$baseline} every iteration of the loop. After the loop finishes, I store the AoH's. $baseline_records refers to the data file.

Data::Dumper shows:


$VAR1 = {
          'LICount' => 0,
          'LICountBase' => 0,
          'LIFloat' => 0,
          'LIFloatBase' => 0,
          'LIICount' => 0,
          'LIICountBase' => 0,
          'ProjectID' => 'STO1019001',
        };
$VAR2 = {
          'LICount' => 0,
          'LICountBase' => 0,
          'LIFloat' => 0,
          'LIFloatBase' => 0,
          'LIICount' => 0,
          'LIICountBase' => 0,
          'ProjectID' => 'STO1018001',
        };
$VAR3 = {
          'LICount' => 38,
          'LICountBase' => 38,
          'LIFloat' => 0,
          'LIFloatBase' => 0,
          'LIICount' => 11,
          'LIICountBase' => 11,
          'ProjectID' => 'STO1005001',
        };

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When I retrieve the data, I'm getting:

my $arrayref = retrieve( $baseline_records );
print Dumper $arrayref;
$VAR1 = \[
            {
              'LICount' => 0,
              'LICountBase' => 0,
              'LIFloat' => 0,
              'LIFloatBase' => 0,
              'LIICount' => 0,
              'LIICountBase' => 0,
              'ProjectID' => 'STO1019001',
            },
            {
              'LICount' => 0,
              'LICountBase' => 0,
              'LIFloat' => 0,
              'LIFloatBase' => 0,
              'LIICount' => 0,
              'LIICountBase' => 0,
              'ProjectID' => 'STO1018001',
            },
            {
              'LICount' => 38,
              'LICountBase' => 38,
              'LIFloat' => 0,
              'LIFloatBase' => 0,
              'LIICount' => 11,
              'LIICountBase' => 11,
              'ProjectID' => 'STO1005001',
            }
          ];

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I know that I'm not dealing with the references properly. The goal is, upon subsequent running of the script, when I loop through the project to return the values based on matching a "ProjectID"

Thanks in advance for any pointers.

Scott...

Replies are listed 'Best First'.
Re: Storable, reference help needed
by afresh1 (Hermit) on Sep 27, 2010 at 22:28 UTC

    Is there a reason you are storing a reference to a reference of an array?

    Where you have store( \$baseline, $baseline_records ), maybe instead it should be store( $baseline, $baseline_records )?

    This gives me identical output: 

    use Storable;
use Data::Dumper;

my $baseline_records = 'file.stor';

my $baseline = [
    {   'LICount'      => 0,
        'LICountBase'  => 0,
        'LIFloat'      => 0,
        'LIFloatBase'  => 0,
        'LIICount'     => 0,
        'LIICountBase' => 0,
        'ProjectID'    => 'STO1019001',
    },
    {   'LICount'      => 0,
        'LICountBase'  => 0,
        'LIFloat'      => 0,
        'LIFloatBase'  => 0,
        'LIICount'     => 0,
        'LIICountBase' => 0,
        'ProjectID'    => 'STO1018001',
    },
    {   'LICount'      => 38,
        'LICountBase'  => 38,
        'LIFloat'      => 0,
        'LIFloatBase'  => 0,
        'LIICount'     => 11,
        'LIICountBase' => 11,
        'ProjectID'    => 'STO1005001',
    }
];

store( $baseline, $baseline_records );
my $arrayref = retrieve($baseline_records);

print Dumper $baseline, $arrayref;

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    l8rZ,
    --
    andrew
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      Thank you!
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