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#!/usr/bin/perl -- |
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package Lingua::NL::Numbers::GroeneBoekje; |
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# Numbers in words, according to the dutch "Groene Boekje". |
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# http://woordenlijst.org/leidraad/6/9/ |
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=head1 NAME |
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Lingua::NL::Numbers::GroeneBoekje - Convert numeric values into their Dutch equivalents |
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=head1 SYNOPSIS |
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use Lingua::NL::Numbers::GroeneBoekje; |
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my $converter = Lingua::NL::Numbers::GroeneBoekje->new; |
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my $text = $converter->parse(124); |
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# prints 'honderdvierentwintig' |
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print $text; |
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=head1 DESCRIPTION |
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Lingua::NL::Numbers::GroeneBoekje converts numeric values to their |
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Dutch written equivalent, according to the guidelines as defined in |
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the "Groene Boekje". For example: |
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twee |
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twintig |
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tweeëntwintig |
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tweehonderd |
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tweehonderdtweeëntwintig |
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tweeëntwintighonderd |
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tweeduizend tweehonderdtwintig |
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twee miljoen tweehonderdtwintigduizend tweehonderdtweeëntwintig |
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=head1 KNOWN BUGS |
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Estimated upper bound is 10**18 - 1, but this is not checked. |
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When "twee" is glued to "en" it will get a dieraesis on the "e" of "en". |
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The result will be a Perl Unicode string. |
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When "drie" is glued to "en" it will get a dieraesis on the "e" of "en". |
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The result will be a Perl Unicode string. |
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=head1 AUTHOR |
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Johan Vromans Ejvromans@squirrel.nlE. |
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=head1 SEE ALSO |
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L |
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http://woordenlijst.org/leidraad/6/9/ |
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=cut |
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$VERSION = "0.10"; |
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use strict; |
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use warnings; |
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sub new { |
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my ($pkg) = @_; |
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$pkg = ref($pkg) || $pkg; |
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bless \(my $o), $pkg; |
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} |
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sub parse { |
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my ($self, $n) = @_; |
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_num_($n); |
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} |
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use constant HOUNDRED => "honderd"; |
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use constant THOUSAND => "duizend"; |
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use constant TEN6TH => "miljoen"; |
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use constant TEN9TH => "miljard"; |
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my @units = |
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( qw(nul een twee drie vier |
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vijf zes zeven acht negen), |
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qw(tien elf twaalf dertien veertien |
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vijftien zestien zeventien achttien negentien) ); |
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my @tens = |
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( qw(nul tien twintig dertig veertig |
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vijftig zestig zeventig tachtig negentig) ); |
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# Regel 6.N |
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# We schrijven een getal in één woord, tot en met het woord duizend. |
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sub _num_ { |
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my ($n) = @_; |
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# Prefab numbers. |
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return $units[$n] if $n < @units; |
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# Small numbers, up to 99. |
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if ( $n < 100 ) { |
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my $t = int($n / 10); |
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my $res = ""; |
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if ( my $r = $n % 10 ) { |
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$res = $units[$r] . "en"; |
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$res =~ s/([ie])ee/$1."eë"/e; |
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} |
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return $res.$tens[$t]; |
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} |
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# Up to 1_999. |
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if ( $n < 1999 ) { |
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my $t = int($n / 100); |
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my $r = $n % 100; |
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my $res; |
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if ( $t % 10 == 0 ) { |
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$res = ($t > 10 ? _num_($t/10) : "") . THOUSAND; |
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# Regel 6.N (vervolg) |
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# Na het woord duizend volgt een spatie. |
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$res .= " " if $r; |
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} |
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else { |
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$res = ($t > 1 ? _num_($t) : "") . HOUNDRED; |
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} |
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$res .= _num_($r) if $r; |
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return $res; |
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} |
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# Up to 999_999. |
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if ( $n < 1000000 ) { |
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my $t = int($n / 1000); |
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my $r = $n % 1000; |
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my $res = ($t > 1 ? _num_($t) : "") . THOUSAND; |
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# Regel 6.N (vervolg) |
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# Na het woord duizend volgt een spatie. |
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$res .= " " . _num_($r) if $r; |
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return $res; |
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} |
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# THe higher ones. |
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return _very_high($n, 1000000, TEN6TH) if $n < 1000000000; |
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return _very_high($n, 1000000000, TEN9TH); |
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"ontzettend veel"; |
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} |
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# Regel 6.N (vervolg) |
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# De woorden miljoen, miljard, biljoen enz. schrijven we los. |
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sub _very_high { |
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my ($n, $m, $w) = @_; |
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my $t = int($n / $m); |
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my $r = $n % $m; |
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my $res = _num_($t) . " " . $w; |
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$res .= " " . _num_($r) if $r; |
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return $res; |
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} |
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unless ( caller ) { |
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package main; |
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foreach ( @ARGV ) { |
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printf("%8d: %s\n", |
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$_, Lingua::NL::Numbers::GroeneBoekje->new->parse($_)); |
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} |
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} |