#filter_out and PureCondorcet weren't getting along well for sparse elections
[rubyvote] / lib / rubyvote / condorcet.rb
index f4ed7b7..3269261 100644 (file)
 
 class CondorcetVote < ElectionVote
 
 
 class CondorcetVote < ElectionVote
 
+  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)
+  end
+
   def tally_vote(vote=nil)
 
     vote.each_with_index do |winner, index|
   def tally_vote(vote=nil)
 
     vote.each_with_index do |winner, index|
@@ -43,14 +56,13 @@ class CondorcetVote < ElectionVote
       if vote.length - 1 == index
         losers = []
       else
       if vote.length - 1 == index
         losers = []
       else
-        losers = vote.last( vote.flatten.length - index )
+        losers = vote.flatten.last( vote.flatten.length - index - 1)
       end
 
       losers.each do |place|
         place = [place] unless place.class == Array
         place.each do |loser|
           
       end
 
       losers.each do |place|
         place = [place] unless place.class == Array
         place.each do |loser|
           
-          next if winner == loser
 
           @votes[winner] = Hash.new unless @votes.has_key?(winner)
           @votes[loser] = Hash.new unless @votes.has_key?(loser)
 
           @votes[winner] = Hash.new unless @votes.has_key?(winner)
           @votes[loser] = Hash.new unless @votes.has_key?(loser)
@@ -63,24 +75,13 @@ class CondorcetVote < ElectionVote
 
           # make sure we have a comparable object
           @votes[loser][winner] = 0 unless @votes[loser].has_key?( winner )
 
           # make sure we have a comparable object
           @votes[loser][winner] = 0 unless @votes[loser].has_key?( winner )
-
-          @candidates << loser unless @candidates.include?( loser )
         end
       end
         end
       end
-
-      @candidates << winner unless @candidates.include?( winner ) || 
-        winner.class == Array
     end
   end
 
   def result
     end
   end
 
   def result
-    top_result = resultFactory( self )
-    until @candidates.empty?
-      aResult = resultFactory( self )
-      top_result.full_results << aResult
-      filter_out(aResult)
-    end
-    top_result
+    resultFactory( self )
   end
 
   protected
   end
 
   protected
@@ -101,6 +102,17 @@ class CloneproofSSDVote < CondorcetVote
   def resultFactory(init)
     CloneproofSSDResult.new(init)
   end
   def resultFactory(init)
     CloneproofSSDResult.new(init)
   end
+
+  def result
+    top_result = resultFactory( self )
+    until @candidates.empty?
+      aResult = resultFactory( self )
+      top_result.full_results << aResult
+      filter_out(aResult)
+    end
+    top_result
+  end
+
 end
 
 
 end
 
 
@@ -125,6 +137,7 @@ class CondorcetResult < ElectionResult
     votes = @election.votes unless votes
 
     defeats = Array.new
     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
     candidates.each do |candidate|
       candidates.each do |challenger|
         next if candidate == challenger
@@ -196,6 +209,7 @@ class CloneproofSSDResult < CondorcetResult
       # see the array with the standard defeats
       transitive_defeats = self.defeats(candidates, votes)
 
       # 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|
       candidates.each do |cand1|
         candidates.each do |cand2|
           candidates.each do |cand3|

Benjamin Mako Hill || Want to submit a patch?