comment on

You would definitely want more than just the pattern you are searching for, especially when processing a form. I will normally also search for some anchors in the form fields.

Example 1 - With anchor fields

use strict;
use warnings;
use Data::Dumper;

my @forms = (
    { name => 'Name: Roger',
      address => 'Address: Melbourne',
      phone => 'Telephone: 12345',
    },
    { name => 'Name: Roger',
      address => 'Address:',
      phone => 'Telephone: 12345',
    },
    { name => 'Name: Roger',
      address => 'Address: Melbourne',
      phone => 'Telephone: 54321',
    },
);

my $m_name = 'Roger';
my $m_address = '';     # means don't care
my $m_phone = '12345';

for my $form (@forms) {
    print Dumper($form);

    if ($form->{name}    =~ /Name:\s*?$m_name/ &&
        $form->{address} =~ /Address:\s*?$m_address/ &&
        $form->{phone}   =~ /Telephone:\s*?$m_phone/)
    {
        print "Match\n";
    } else {
        print "Not match\n";
    }
}
[download]

And the output -

$VAR1 = {
          'address' => 'Address: Melbourne',
          'phone' => 'Telephone: 12345',
          'name' => 'Name: Roger'
        };
Match
$VAR1 = {
          'address' => 'Address:',
          'phone' => 'Telephone: 12345',
          'name' => 'Name: Roger'
        };
Match
$VAR1 = {
          'address' => 'Address: Melbourne',
          'phone' => 'Telephone: 54321',
          'name' => 'Name: Roger'
        };
Not match
[download]

Ok, another example without the anchors -

Example 2 - Without anchor fields

use strict;
use warnings;
use Data::Dumper;

my @forms = (
    { name => 'Roger',
      address => 'Melbourne',
      phone => '12345',
    },
    { name => 'Roger',
      address => '',
      phone => '12345',
    },
    { name => 'Roger',
      address => 'Melbourne',
      phone => '54321',
    },
);

my $m_name = 'Roger';
my $m_address = '';     # means don't care
my $m_phone = '12345';

for my $form (@forms) {
    print Dumper($form);
    
    my ($t_name, $t_address, $t_phone) =
        taint_fields($m_name, $m_address, $m_phone);

    if ($form->{name}    =~ /$t_name/ &&
        $form->{address} =~ /$t_address/ &&
        $form->{phone}   =~ /$t_phone/)
    {
        print "Match\n";
    } else {
        print "Not match\n";
    }
}

sub taint_fields {
    return map { $_ ||= '.*' } @_;
}
[download]

In reply to Re: a word of warning about /$pattern/ by Roger
in thread a word of warning about /$pattern/ by dada

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