ch08.031_prob

Perl Best Practices the source code

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 8 of "Perl Best Practices"  ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;


my $sales_data = \*DATA;
my @sales;

sub translate_ID {
    my ($id) = @_;
    return $id;
}



# Specify field separator...
Readonly my $RECORD_SEPARATOR => qr/\s* , \s*/xms;
Readonly my $FIELD_COUNT      => 3;

 
# Grab each line/record...
while (my $record = <$sales_data>) {
    chomp $record;
 
    # Extract all fields...
    my ($ident, $sales, $price, $unexpected_data) 
            = split $RECORD_SEPARATOR, $record, $FIELD_COUNT+1;
    
    carp "Unexpected trailing garbage at end of record id '$ident':\n",
        "\t$unexpected_data\n"
            if $unexpected_data;

 
    # Append each record, translating ID codes and
    # normalizing sales (which are stored in 1000s)...

    push @sales, { 
        ident => translate_ID($ident),
        sales => $sales * 1000,
        price => $price,
    };
}



use Data::Dumper 'Dumper';
warn Dumper [ @sales ];


__DATA__
X123-S, 0000013247, 00000199
SFG-AT ,0000000102 ,00009099
Y811-Q,0000100300,00000033 , oops!