/ 
Business-GL-Postalcode-0.06
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/ Business::GL::Postalcode

NAME

Business::GL::Postalcode - Greenland postal code validator and container

VERSION

This documentation describes version 0.02

SYNOPSIS

# basic validation of string
use Business::GL::Postalcode qw(validate);

if (validate($postalcode)) {
    print "We have a valid Greenland postal code\n";
} else {
    warn "Not a valid Greenland postal code\n";
}


# basic validation of string, using less intrusive subroutine
use Business::GL::Postalcode qw(validate_postalcode);

if (validate_postalcode($postalcode)) {
    print "We have a valid Greenland postal code\n";
} else {
    warn "Not a valid Greenland postal code\n";
}


# using the untainted return value
use Business::GL::Postalcode qw(validate_postalcode);

if (my $untainted = validate_postalcode($postalcode)) {
    print "We have a valid Greenland postal code: $untainted\n";
} else {
    warn "Not a valid Greenland postal code\n";
}


# All postal codes for use outside this module
use Business::GL::Postalcode qw(get_all_postalcodes);

my @postalcodes = @{get_all_postalcodes()};


# All postal codes and data for use outside this module
use Business::GL::Postalcode qw(get_all_data);

my $postalcodes = get_all_data();

foreach (@{postalcodes}) {
    printf
        'postal code: %s city: %s street/desc: %s company: %s province: %d country: %d', split /;/, $_, 6;
}

FEATURES

  • Providing list of Greenland postal codes and related area names

  • Look up methods for Greenland postal codes for web applications and the like

  • The postal code for Santa Claus (father Christmas)

DESCRIPTION

This distribution is not the original resource for the included data, but simply acts as a simple distribution for Perl use. The central source is monitored so this distribution can contain the newest data. The monitor script (postdanmark.pl) is included in the distribution: https://metacpan.org/pod/Business::DK::Postalcode.

The data are converted for inclusion in this module. You can use different extraction subroutines depending on your needs:

Data

Here follows a description of the included data, based on the description from the original source and the authors interpretation of the data, including details on the distribution of the data.

city name

A non-unique, case-sensitive representation of a city name in Greenlandic or Danish.

street/description

This field is unused for this dataset.

company name

This field is unused for this dataset.

province

This field is a bit special and it's use is expected to be related to distribution all entries are marked as 'False'. The data are included since they are a part of the original data.

country

Since the original source contains data on 3 different countries:

  • Denmark (1)

  • Greenland (2)

  • Faroe Islands (3)

Only the data representing Greenland has been included in this distribution, so this field is always containing a '2'.

For access to the data on Denmark or Faroe Islands please refer to: Business::DK::Postalcode and Business::FO::Postalcode respectfully.

Encoding

The data distributed are in Greenlandic and Danish for descriptions and names and these are encoded in UTF-8.

SUBROUTINES AND METHODS

validate

A simple validator for Greenlandic postal codes.

Takes a string representing a possible Greenlandic postal code and returns either 1 or 0 indicating either validity or invalidity.

my $rv = validate(3900);

if ($rv == 1) {
    print "We have a valid Greenlandic postal code\n";
} ($rv == 0) {
    print "Not a valid Greenlandic postal code\n";
}

validate_postalcode

A less intrusive subroutine for import. Acts as a wrapper of "validate".

my $rv = validate_postalcode(2412);

if ($rv) {
    print "We have a valid Greenlandic postal code\n";
} else {
    print "Not a valid Greenlandic postal code\n";
}

get_all_data

Returns a reference to a a list of strings, separated by tab characters. See "Data" for a description of the fields.

use Business::GL::Postalcode qw(get_all_data);

my $postalcodes = get_all_data();

foreach (@{postalcodes}) {
    printf
        'postalcode: %s city: %s street/desc: %s company: %s province: %d country: %d', split /\t/, $_, 6;
}

get_all_postalcodes

Takes no parameters.

Returns a reference to an array containing all valid Danish postal codes.

use Business::GL::Postalcode qw(get_all_postalcodes);

my $postalcodes = get_all_postalcodes;

foreach my $postalcode (@{$postalcodes}) { ... }

get_all_cities

Takes no parameters.

Returns a reference to an array containing all Danish city names having a postal code.

use Business::GL::Postalcode qw(get_all_cities);

my $cities = get_all_cities;

foreach my $city (@{$cities}) { ... }

Please note that this data source used in this distribution by no means is authorative when it comes to cities located in Denmark, it might have all cities listed, but unfortunately also other post distribution data.

get_city_from_postalcode

Takes a string representing a Danish postal code.

Returns a single string representing the related city name or an empty string indicating nothing was found.

use Business::GL::Postalcode qw(get_city_from_postalcode);

my $zipcode = '3900';

my $city = get_city_from_postalcode($zipcode);

if ($city) {
    print "We found a city for $zipcode\n";
} else {
    warn "No city found for $zipcode";
}

get_postalcode_from_city

Takes a string representing a Danish/Greenlandic city name.

Returns a reference to an array containing zero or more postal codes related to that city name. Zero indicates nothing was found.

Please note that city names are not unique, hence the possibility of a list of postal codes.

use Business::GL::Postalcode qw(get_postalcode_from_city);

my $city = 'Nuuk';

my $postalcodes = get_postalcode_from_city($city);

if (scalar @{$postalcodes} == 1) {
    print "$city is unique\n";
} elsif (scalar @{$postalcodes} > 1) {
    warn "$city is NOT unique\n";
} else {
    die "$city not found\n";
}

DIAGNOSTICS

There are not special diagnostics apart from the ones related to the different subroutines.

CONFIGURATION AND ENVIRONMENT

This distribution requires no special configuration or environment.

DEPENDENCIES

TEST

Please note that the above list does not reflect requirements for:

  • Additional components in this distribution, see lib/. Additional components list own requirements

  • Test and build system, please see: Build.PL for details

BUGS AND LIMITATIONS

There are no known bugs at this time.

The data source used in this distribution by no means is authorative when it comes to cities located in Denmark, it might have all cities listed, but unfortunately also other post distribution data.

BUG REPORTING

Please report issues via CPAN RT:

SEE ALSO

Business::DK::Postalcode
Business::FO::Postalcode

MOTIVATION

Postdanmark the largest danish postal and formerly stateowned postal service, maintain the postalcode mapping for Greenland and the Faroe Islands. Since I am using this resource to maintain the danish postalcodes I decided to release distributions of these two other countries.

AUTHOR

Jonas B. Nielsen, (jonasbn) - <jonasbn@cpan.org>

COPYRIGHT

Business-GL-Postalcode is (C) by Jonas B., (jonasbn) 2014-2019

Business-GL-Postalcode is released under the artistic license 2.0