1Locale::Maketext::CookbUosoekr(3C)ontributed Perl DocumeLnotcaatlieo:n:Maketext::Cookbook(3)
2
3
4

NAME

6       Locale::Maketext::Cookbook - recipes for using Locale::Maketext
7

INTRODUCTION

9       This is a work in progress. Not much progress by now :-)
10

ONESIDED LEXICONS

12       Adapted from a suggestion by Dan Muey
13
14       It may be common (for example at your main lexicon) that the hash keys
15       and values coincide. Like that
16
17           q{Hello, tell me your name}
18             => q{Hello, tell me your name}
19
20       It would be nice to just write:
21
22           q{Hello, tell me your name} => ''
23
24       and have this magically inflated to the first form.  Among the
25       advantages of such representation, that would lead to smaller files,
26       less prone to mistyping or mispasting, and handy to someone translating
27       it which can simply copy the main lexicon and enter the translation
28       instead of having to remove the value first.
29
30       That can be achieved by overriding "init" in your class and working on
31       the main lexicon with code like that:
32
33           package My::I18N;
34           ...
35
36           sub init {
37               my $lh = shift; # a newborn handle
38               $lh->SUPER::init();
39               inflate_lexicon(\%My::I18N::en::Lexicon);
40               return;
41           }
42
43           sub inflate_lexicon {
44               my $lex = shift;
45               while (my ($k, $v) = each %$lex) {
46                   $v = $k if !defined $v || $v eq '';
47               }
48           }
49
50       Here we are assuming "My::I18N::en" to own the main lexicon.
51
52       There are some downsides here: the size economy will not stand at
53       runtime after this "init()" runs. But it should not be that critical,
54       since if you don't have space for that, you won't have space for any
55       other language besides the main one as well. You could do that too with
56       ties, expanding the value at lookup time which should be more time
57       expensive as an option.
58

DECIMAL PLACES IN NUMBER FORMATTING

60       After CPAN RT #36136
61       (<https://rt.cpan.org/Ticket/Display.html?id=36136>)
62
63       The documentation of Locale::Maketext advises that the standard bracket
64       method "numf" is limited and that you must override that for better
65       results. It even suggests the use of Number::Format.
66
67       One such defect of standard "numf" is to not be able to use a certain
68       decimal precision.  For example,
69
70           $lh->maketext('pi is [numf,_1]', 355/113);
71
72       outputs
73
74           pi is 3.14159292035398
75
76       Since pi ≈ 355/116 is only accurate to 6 decimal places, you would want
77       to say:
78
79           $lh->maketext('pi is [numf,_1,6]', 355/113);
80
81       and get "pi is 3.141592".
82
83       One solution for that could use "Number::Format" like that:
84
85           package Wuu;
86
87           use base qw(Locale::Maketext);
88
89           use Number::Format;
90
91           # can be overridden according to language conventions
92           sub _numf_params {
93               return (
94                   -thousands_sep  => '.',
95                   -decimal_point  => ',',
96                   -decimal_digits => 2,
97               );
98           }
99
100           # builds a Number::Format
101           sub _numf_formatter {
102               my ($lh, $scale) = @_;
103               my @params = $lh->_numf_params;
104               if ($scale) { # use explicit scale rather than default
105                   push @params, (-decimal_digits => $scale);
106               }
107               return Number::Format->new(@params);
108           }
109
110           sub numf {
111               my ($lh, $n, $scale) = @_;
112               # get the (cached) formatter
113               my $nf = $lh->{__nf}{$scale} ||= $lh->_numf_formatter($scale);
114               # format the number itself
115               return $nf->format_number($n);
116           }
117
118           package Wuu::pt;
119
120           use base qw(Wuu);
121
122       and then
123
124           my $lh = Wuu->get_handle('pt');
125           $lh->maketext('A [numf,_1,3] km de distância', 1550.2222);
126
127       would return "A 1.550,222 km de distância".
128
129       Notice that the standard utility methods of "Locale::Maketext" are
130       irremediably limited because they could not aim to do everything that
131       could be expected from them in different languages, cultures and
132       applications. So extending "numf", "quant", and "sprintf" is natural as
133       soon as your needs exceed what the standard ones do.
134
135
136
137perl v5.36.0                      2022-08-23     Locale::Maketext::Cookbook(3)
Impressum