cldr-plurals-runtime-rb
Ruby runtime methods for CLDR plural rules (see camertron/cldr-plurals).
Installation
gem install cldr-plurals-runtime-rb
Usage
require 'cldr-plurals/ruby_runtime'
Functionality
The CLDR data set contains plural information for numerous languages in an expression-based format defined by Unicode's TR35. The document describes how to determine the various parts of a number and how to use those parts to determine the plural rule. The parts as they appear in TR35 are:
Symbol | Value |
---|---|
n | absolute value of the source number (integer and decimals). |
i | integer digits of n. |
v | number of visible fraction digits in n, with trailing zeros. |
w | number of visible fraction digits in n, without trailing zeros. |
f | visible fractional digits in n, with trailing zeros. |
t | visible fractional digits in n, without trailing zeros. |
c/e | compact decimal exponent value |
cldr-plurals-runtime-rb is an implementation of these calculations in Ruby. You can use them via the CldrPlurals::RubyRuntime
module. Note that all methods take a stringified number as input:
num = '1.04'
CldrPlurals::RubyRuntime.n(num) # => 1.04
CldrPlurals::RubyRuntime.i(num) # => 1
This runtime was created primarily for the cldr-plurals project, which can parse and emit Ruby code for a set of plural rules. Here's an example:
require 'cldr-plurals'
require 'cldr-plurals/ruby_runtime'
rules = CldrPlurals::Compiler::RuleList.new(:ru).tap do |rule_list|
rule_list.add_rule(:one, 'v = 0 and i % 10 = 1 and i % 100 != 11')
rule_list.add_rule(:few, 'v = 0 and i % 10 = 2..4 and i % 100 != 12..14')
rule_list.add_rule(:many, 'v = 0 and i % 10 = 0 or v = 0 and i % 10 = 5..9 or v = 0 and i % 100 = 11..14')
end
ruby_code = rules.to_code(:ruby)
rule_proc = eval(ruby_code)
rule_proc.call('3', CldrPlurals::RubyRuntime) # => :few
Requirements
No external requirements.
Running Tests
bundle exec rake
should do the trick. Alternatively you can run bundle exec rspec
, which does the same thing.
Authors
- Cameron C. Dutro: http://github.com/camertron