projects.mako.cc - selectricity/blob - lib/rubyvote/range.rb

   1 # Range voting as described in wikipedia.
   2 # (http://en.wikipedia.org/wiki/Range_voting)
   3
   4 class RangeVote < ElectionVote
   5   def initialize(votes = nil, range = 1..10)
   6     @valid_range = range
   7     super(votes)
   8   end
   9
  10   def result
  11     RangeResult.new(self)
  12   end
  13
  14   protected
  15   def verify_vote(vote=nil)
  16     vote.instance_of?(Hash) && vote.all?{|c,score| @valid_range.include?(score)}
  17   end
  18
  19   def tally_vote(vote)
  20     vote.each do |candidate, score|
  21       if @votes.has_key?(candidate)
  22         @votes[candidate] += score
  23       else
  24         @votes[candidate] = score
  25         @candidates << candidate
  26       end
  27     end
  28   end
  29 end
  30
  31 class RangeResult < PluralityResult
  32 end