1Class::Measure(3pm)   User Contributed Perl Documentation  Class::Measure(3pm)
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NAME

6       Class::Measure - Create, compare, and convert units of measurement.
7

SYNOPSIS

9       See Class::Measure::Length for some examples.
10

DESCRIPTION

12       This is a base class that is inherited by the Class::Measure classes.
13       This distribution comes with the class Class::Measure::Length.
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15       The classes Class::Measure::Area, Class::Measure::Mass,
16       Class::Measure::Space, Class::Measure::Temperature, and
17       Class::Measure::Volume are planned and will be added soon.
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19       The methods described here are available in all Class::Measure classes.
20

METHODS

22   new
23           my $m = new Class::Measure::Length( 1, 'inch' );
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25       Creates a new measurement object.  You must pass an initial measurement
26       and default unit.
27
28       In most cases the measurement class that you are using will export a
29       method to create new measurements.  For example Class::Measure::Length
30       exports the "length()" method.
31
32   unit
33         my $unit = $m->unit();
34
35       Returns the object's default unit.
36
37   set_unit
38           $m->set_unit( 'feet' );
39
40       Sets the default unit of the measurement.
41
42   value
43           my $yards = $m->value('yards');
44           my $val = $m->value();
45           print "$m is the same as $val when in a string\n";
46
47       Retrieves the value of the measurement in the default unit.  You may
48       specify a unit in which case the value is converted to the unit and
49       returned.
50
51       This method is also used to handle overloading of stringifying the
52       object.
53
54   set_value
55           my $m = length( 0, 'inches' );
56           $m->set_value( 12 ); # 12 inches.
57           $m->set_value( 1, 'foot' ); # 1 foot.
58
59       Sets the measurement in the default unit.  You may specify a new
60       default unit as well.
61
62   reg_units
63           Class::Measure::Length->reg_units(
64               'inch', 'foot', 'yard',
65           );
66
67       Registers one or more units for use in the specified class.  Units
68       should be in the singular, most common, form.
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70   units
71           my @units = Class::Measure::Length->units();
72
73       Returns a list of all registered units.
74
75   reg_aliases
76           Class::Measure::Length->reg_aliases(
77               ['feet','ft'] => 'foot',
78               ['in','inches'] => 'inch',
79               'yards' => 'yard'
80           );
81
82       Register alternate names for units.  Expects two arguments per unit to
83       alias.  The first argument being the alias (scalar) or aliases (array
84       ref), and the second argument being the unit to alias them to.
85
86   reg_convs
87           Class::Measure::Length->reg_convs(
88               12, 'inches' => 'foot',
89               'yard' => '3', 'feet'
90           );
91
92       Registers a unit conversion.  There are three distinct ways to specify
93       a new conversion.  Each requires three arguments.
94
95           $count1, $unit1 => $unit2
96           $unit1 => $count2, $unit2
97
98       These first two syntaxes create automatic reverse conversions as well.
99       So, saying there are 12 inches in a foot implies that there are 1/12
100       feet in an inch.
101
102           $unit1 => $unit2, $sub
103
104       The third syntax accepts a subroutine as the last argument the
105       subroutine will be called with the value of $unit1 and it's return
106       value will be assigned to $unit2.  This third syntax does not create a
107       reverse conversion automatically.
108

SUPPORT

110       Please submit bugs and feature requests to the Class-Measure GitHub
111       issue tracker:
112
113       <https://github.com/bluefeet/Class-Measure/issues>
114

AUTHORS

116           Aran Clary Deltac <bluefeet@gmail.com>
117           Roland van Ipenburg <roland@rolandvanipenburg.com>
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LICENSE

120       This library is free software; you can redistribute it and/or modify it
121       under the same terms as Perl itself.
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125perl v5.34.0                      2022-01-21               Class::Measure(3pm)