to_sentence (ActiveSupport::CoreExtensions::Array::Conversions)

    # File lib/active_support/core_ext/array/conversions.rb, line 9
            def to_sentence(options = {})
              default_words_connector     = I18n.translate('support.array.words_connector''support.array.words_connector',     :locale => options[:locale])
              default_two_words_connector = I18n.translate('support.array.two_words_connector''support.array.two_words_connector', :locale => options[:locale])
              default_last_word_connector = I18n.translate('support.array.last_word_connector''support.array.last_word_connector', :locale => options[:locale])

              # Try to emulate to_senteces previous to 2.3
              if options.has_key?(:connector) || options.has_key?(:skip_last_comma)
                ::ActiveSupport::Deprecation.warn(":connector has been deprecated. Use :words_connector instead", caller) if options.has_key? :connector
                ::ActiveSupport::Deprecation.warn(":skip_last_comma has been deprecated. Use :last_word_connector instead", caller) if options.has_key? :skip_last_comma

                skip_last_comma = options.delete :skip_last_comma
                if connector = options.delete(:connector)
                  options[:last_word_connector] ||= skip_last_comma ? connector : ", #{connector}"
                else
                  options[:last_word_connector] ||= skip_last_comma ? default_two_words_connector : default_last_word_connector
                end
              end

              options.assert_valid_keys(:words_connector, :two_words_connector, :last_word_connector, :locale)
              options.reverse_merge! :words_connector => default_words_connector, :two_words_connector => default_two_words_connector, :last_word_connector => default_last_word_connector

              case length
                when 0
                  ""
                when 1
                  self[0].to_s
                when 2
                  "#{self[0]}#{options[:two_words_connector]}#{self[1]}"
                else
                  "#{self[0...-1].join(options[:words_connector])}#{options[:last_word_connector]}#{self[-1]}"
              end
            end