class CondorcetVote < ElectionVote
+ attr_accessor :results
+
+ def initialize(votes=nil)
+ unless defined?(@candidates)
+ @candidates = Array.new
+ votes.each do |vote_row|
+ vote_row = vote_row.flatten if vote_row.class == Array
+ vote_row.each do |vote|
+ @candidates << vote unless @candidates.include?(vote)
+ end
+ end
+ end
+ super(votes)
+ @results = Array.new
+ end
+
def tally_vote(vote=nil)
vote.each_with_index do |winner, index|
- # only run through this if this *is* preferred to something
- break if vote.length - 1 == index
- losers = vote.last( vote.length - index )
-
- losers.each do |loser|
- next if winner == loser
+ if vote.flatten.length < @candidates.length
+ implied_losers = @candidates.select { |c| not vote.include?(c) }
+ vote.push(implied_losers)
+ end
+ if vote.length - 1 == index
+ losers = []
+ else
+ losers = vote.flatten.last( vote.flatten.length - index - 1)
+ end
- @votes[winner] = Hash.new unless @votes.has_key?(winner)
- @votes[loser] = Hash.new unless @votes.has_key?(loser)
+ losers.each do |place|
+ place = [place] unless place.class == Array
+ place.each do |loser|
+
- if @votes[winner].has_key?(loser)
- @votes[winner][loser] += 1
- else
- @votes[winner][loser] = 1
- end
+ @votes[winner] = Hash.new unless @votes.has_key?(winner)
+ @votes[loser] = Hash.new unless @votes.has_key?(loser)
- # make sure we have a comparable object
- @votes[loser][winner] = 0 unless @votes[loser].has_key?( winner )
+ if @votes[winner].has_key?(loser)
+ @votes[winner][loser] += 1
+ else
+ @votes[winner][loser] = 1
+ end
- @candidates << loser unless @candidates.include?( loser )
+ # make sure we have a comparable object
+ @votes[loser][winner] = 0 unless @votes[loser].has_key?( winner )
+ end
end
+ end
+ end
- @candidates << winner unless @candidates.include?( winner )
+ def results
+ if @results.size < 2 && (not @candidates.empty?)
+ tabulate
end
+ @results
end
def result
- top_result = resultFactory( self )
- until @candidates.empty?
- aResult = resultFactory( self )
- top_result.full_results << aResult
- filter_out(aResult)
- end
- top_result
+ find_only_winner unless @winner
+ @winner
end
protected
+
def verify_vote(vote=nil)
vote.instance_of?( Array ) and
vote == vote.uniq
end
+ def tabulate
+ find_only_winner unless @winner
+ until @candidates.empty?
+ aResult = resultFactory( self )
+ @results << aResult.winners
+ filter_out(aResult)
+ end
+ end
+
+ def find_only_winner
+ @winner = resultFactory( self )
+ @results << @winner.winners
+ filter_out(@winner)
+ end
+
end
class PureCondorcetVote < CondorcetVote
- def resultFactory(init)
- PureCondorcetResult.new(init)
+ def result
+ PureCondorcetResult.new(self)
end
end
def resultFactory(init)
CloneproofSSDResult.new(init)
end
+
end
votes = @election.votes unless votes
defeats = Array.new
+ candidates = [candidates] unless candidates.class == Array
candidates.each do |candidate|
candidates.each do |challenger|
next if candidate == challenger
# see the array with the standard defeats
transitive_defeats = self.defeats(candidates, votes)
+ candidates = [candidates] unless candidates.class == Array
candidates.each do |cand1|
candidates.each do |cand2|
candidates.each do |cand3|