Issues generating a select languages list

[dankohn]

Thanks very much for assembling the list of languages.

We needed a select tag of common languages, but with English and Spanish shown first. We also wanted to list both Mandarin and Cantonese, and remove the parentheticals. We used iso_639_3 to get a code for Cantonese. Others may find this useful:

# app/application_helper.rb

  def our_languages
    # Fix names, add Cantonese, and bring English and Spanish to the front
    LanguageList::COMMON_LANGUAGES.map do |language|
      [language.name.gsub('Modern Greek (1453-)', 'Greek')
        .gsub('Tonga (Tonga Islands)', 'Tongan')
        .gsub('Chinese', 'Chinese Mandarin'),
       language.iso_639_3]
    end.push(['Chinese Cantonese', 'yue']).sort.promote(%w(Spanish spa))
      .promote(%w(English eng))
  end

  class ActionView::Helpers::FormBuilder
    # http://stackoverflow.com/a/2625727/1935918
    include ApplicationHelper
    include ActionView::Helpers::FormTagHelper
    include ActionView::Helpers::FormOptionsHelper

    def language_select(name, options = { include_blank: true })
      select_tag "#{@object_name}[#{name}]",
                 options_for_select(our_languages,
                                    selected: @object.send(name)), options
    end

  class Array
    def promote(promoted_element)
      return self unless (found_index = find_index(promoted_element))
      unshift(delete_at(found_index))
    end
  end