gistfile1.txt

test.rb

def replaceranked
  oldrankings = Question.where(:rank => [1,2,3,4,5])

  # Mocking the creation of a new top 5
  newrankings = Question.where(:id => [4,5,6,7,8])
  newrankings.each_with_index do |a, i| 
    a.rank = i+
  end

  oldids = oldrankings.map{|a| a.id}
  newids = newrankings.map{|a| a.id}
  simlarities = oldids & newids

  oldrankings.each_with_index do |a, i| 
    if !(similarities.includes?(a.id))
      newrankings.push(a) 
      oldrankings.delete_at(i) 
    end
  end

  oldrankings.map{|a| a.rank = nil}
  updatedtopfive = newrankings | oldrankings
  updatedtopfive.map{|a| a.save}
end