https://github.com/camertron/cldr-plurals-runtime-rb

Ruby runtime methods for CLDR plural rules (see camertron/cldr-plurals).
https://github.com/camertron/cldr-plurals-runtime-rb

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Ruby runtime methods for CLDR plural rules (see camertron/cldr-plurals).

• Host: GitHub
• URL: https://github.com/camertron/cldr-plurals-runtime-rb
• Owner: camertron
• License: mit
• Created: 2014-09-29T16:45:32.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2020-11-24T05:23:38.000Z (about 4 years ago)
• Last Synced: 2024-11-04T00:42:07.306Z (2 months ago)
• Language: Ruby
• Size: 9.77 KB
• Stars: 2
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: History.txt
  • License: LICENSE.txt

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cldr-plurals-runtime-rb

=================

[![Build Status](https://travis-ci.org/camertron/cldr-plurals-runtime-rb.svg?branch=master)](http://travis-ci.org/camertron/cldr-plurals-runtime-rb)

Ruby runtime methods for CLDR plural rules (see camertron/cldr-plurals).

## Installation

`gem install cldr-plurals-runtime-rb`

## Usage

```ruby

require 'cldr-plurals/ruby_runtime'

```

## Functionality

The CLDR data set contains [plural information](http://unicode.org/cldr/trac/browser/tags/release-26-d04/common/supplemental/plurals.xml) for numerous languages in an expression-based [format](http://www.unicode.org/reports/tr35/tr35-numbers.html#Language_Plural_Rules) 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.        |

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:

```ruby

num = '1.04'

CldrPlurals::RubyRuntime.n(num)  # => 1.04

CldrPlurals::RubyRuntime.i(num)  # => 1

```

This runtime was created primarily for the [cldr-plurals](https://github.com/camertron/cldr-plurals) project, which can parse and emit Ruby code for a set of plural rules. Here's an example:

```ruby

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