RTL

This gem helps you check whether a language direction is right-to-left (RTL) or left-to-right (LTR) implicitly, by supplying its full name, iso code, or other options.

Installation

Add this line to your application's Gemfile:

gem 'rtl'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rtl

Usage

Query a language by string or symbol:

require 'rtl'

Rtl.rtl? 'ar'                      #=> true
Rtl.rtl? :ara                      #=> true

Query a language by ISO 639 code, (the default) ..

Rtl.rtl? :syc, :iso_code           #=> true
Rtl.rtl? :eng                      #=> false

Or by ISO 15924 code ..

Rtl.rtl? 'Hung', :iso_long_code    #=> true

Or by ISO number ..

Rtl.rtl? 130, :iso_number          #=> true

Or by unicode alias ..

Rtl.rtl? 'Hebrew', :unicode_alias  #=> true

Or by full name ..

Rtl.rtl? :Persian, :full_name      #=> true

Or check all ways ..

Rtl.rtl? :kur, :all      #=> true

Which is the default, in case no scheme criteria is specified.

Get List of all languages by any of the above criteria:

Rtl.rtl_languages
#=> ["ar", "ara", "arc", "ae", "ave", "egy", "he", "heb", "nqo", "pal", "phn", "sam", "syc", "syr", "fa", "per", "fas", "ku", "kur"]

Rtl.rtl_languages :iso_long_code
#=> ...

Useful Links

• ISO 639-2 Language Code List - Codes for the representation of names of languages (Library of Congress).
• List of ISO 639-1 codes on Wikipedia.
• Right-to-left on Wikipedia.
• ISO 15924 on Wikipedia.
• Questions & Answers: Which languages are written right-to-left (RTL)?

Contributing

Bug reports and pull requests are very much appreciated at Github.

License

The gem is available as open source under the terms of the MIT License.