class CondorcetVote < ElectionVote
- attr_accessor :results
-
def initialize(votes=nil)
unless defined?(@candidates)
@candidates = Array.new
end
end
super(votes)
- @results = Array.new
end
def tally_vote(vote=nil)
end
end
- def results
- if @results.size < 2 && (not @candidates.empty?)
- tabulate
- end
- @results
- end
-
- def 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
class CloneproofSSDVote < CondorcetVote
- def resultFactory(init)
- CloneproofSSDResult.new(init)
+ def result
+ CloneproofSSDResult.new(self)
end
-
end
end
def victories_and_ties
- victors = Array.new
- ties = Array.new
+ victories_ties = {}
candidates = @matrix.keys.sort
candidates.each do |candidate|
candidates.each do |challenger|
next if candidate == challenger
diff = @matrix[candidate][challenger] - @matrix[challenger][candidate]
- if diff > 0
- victors << [candidate, challenger, diff]
- elsif diff == 0 && ties.include?([challenger, candidate]) == false
- ties << [candidate, challenger]
+ victories_ties[candidate] = {} unless victories_ties.key?(candidate)
+ if diff >= 0
+ victories_ties[candidate][challenger] = diff
end
end
end
- victories = victors.sort {|a,b| b[2] <=> a[2]}
-
- return victories, ties
+ return victories_ties
+ end
+
+ def ranked_candidates
+ if not defined?(@ranked_candidates)
+ @ranked_candidates = build_ranked_candidates()
+ end
+
+ @ranked_candidates
end
protected
defeats
end
+
+ def build_ranked_candidates
+ # build a lis of ranked candidates by dropping the winner and
+ # cursing
+
+ ranked_candidates = []
+
+ resultobj = self.dup
+ candidates = self.election.candidates
+
+ until candidates.empty?
+ ranked_candidates << resultobj.winners
+
+ new_voteobj = resultobj.election.dup
+ candidates = new_voteobj.candidates
+ new_voteobj.candidates.delete_if {|x| resultobj.winners.include?(x)}
+ resultobj = new_voteobj.result
+ end
+
+ ranked_candidates
+ end
end