def to_sentence(options = {})
if defined?(I18n)
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])
else
default_words_connector = ", "
default_two_words_connector = " and "
default_last_word_connector = ", and "
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.dup
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