Question

I make my hash in the order listed below and I sort it in ascending order fine, but when I want to sort it in descending order I don’t get the correct result.

Hash is this

hash_answers = {}
unless answers.blank?
  answers.each_with_index do |ans, index|
    voted_up_users = ans.votes_up_by_all_users(ans)
    voted_down_users = ans.votes_down_by_all_users(ans)

    hash_answers[ans.id] = {
        :id => ans.id,
        :count => voted_up_users.count - voted_down_users.count,
                                       :created_at => ans.created_at
    }
  end
end

This code above works fine when I sort it in ascending order by created_at and count base

   answers = hash_answers.sort_by { |k, v| [ v[:count] , v[:created_at] ] } 

but how can I sort this hash in descending order by created_at and on base of count.

Help if anyone can
Thanks

Answer 1

You can use block in sort method, in block you should provide the sort rule, in your case it might be like this:

temp = hash_answers.sort do |h1,h2| 
  v1 = h1.last; v2 = h2.last
  [v2[:count],v2[:created_at]] <=> [v1[:count],v1[:created_at]]
end

answer = Hash[temp]