Create a human-readable list with "and" inserted before the last element from a ruby list
Try: [list[0...-1].join(", "), list.last].join(", and ")
.
Edit: Rails has the method you were probably looking for, called to_sentence
.
In case you do not have Rails or do not wish to depend on Rails, open Array
class and include the above method, like:
class Array
def join_all(join_with = ", ", connector = "and", last_comma = false)
return self.to_s if self.empty? || self.size==1
connector = join_with+connector if last_comma
[list[0...-1].join(join_with), list.last].join(connector)
end
end
class Array
def to_sentence
sentence = self[0..-2].join(", ") + ", and " + self[-1].to_s if self.size > 1
sentence ||= self.to_s
end
end
so
[1].to_sentence
#=> "1"
[1,2,3].to_sentence
#=> "1, 2, and 3"
[].to_sentence
#=> ""
And in Rails here is to_sentence method that uses I18n locales as well