upgraded to latest version of rubyvote in svn

[selectricity] / lib / rubyvote / runoff.rb

diff --git a/lib/rubyvote/runoff.rb b/lib/rubyvote/runoff.rb
deleted file mode 100644 (file)
index 8a69a4e..0000000
--- a/lib/rubyvote/runoff.rb
+++ /dev/null
@@ -1,88 +0,0 @@
-class InstantRunoffVote < ElectionVote
-  def initialize(votes=nil)
-    @candidates = Array.new
-    votes.each do |vote|
-      @candidates = vote.uniq if vote.uniq.length > candidates.length
-    end
-    super(votes)
-    @candidates.each do |candidate|
-      @votes[candidate] = [0, Hash.new] unless @votes.has_key?(candidate)
-    end
-  end
-
-  def result
-    InstantRunoffResult.new(self)
-  end
-  
-  protected
-  def tally_vote(vote)
-    votecopy = vote.dup
-    candidate = votecopy.shift
-    votes[candidate] = [0, Hash.new] unless votes.has_key?(candidate)
-    votes[candidate][0] += 1
-    if votes[candidate][1].has_key?(votecopy)
-      votes[candidate][1][votecopy] += 1
-    else
-      votes[candidate][1][votecopy] = 1
-    end
-  end
-
-  def verify_vote(vote=nil)
-    vote.instance_of?( Array ) and
-      vote == vote.uniq
-  end
-end
-
-class InstantRunoffResult < ElectionResult
-  attr_reader :ranked_candidates
-
-  def initialize(voteobj=nil)
-    unless voteobj and voteobj.kind_of?( InstantRunoffVote )
-      raise ArgumentError, "You must pass an InstantRunoffVote array.", caller
-    end
-    super(voteobj)
-
-    votes = @election.votes.clone
-    candidates = @election.candidates
-    majority = votes.inject(0) {|n, value| n + value[1][0]}/2 + 1
-    @ranked_candidates = Array.new()
-    ranked_candidates = Array.new()
-
-    loop do
-      ranked_candidates = votes.sort do |a, b|
-        b[1][0] <=> a[1][0]
-      end.collect {|i| i[0]}
-      @winners = ranked_candidates.find_all do |i|
-        votes[i][0] >= majority
-      end
-      
-      loser = ranked_candidates[-1]
-      break if self.winner? or votes[loser][0] == votes[ranked_candidates[-2]][0]
-
-      @ranked_candidates.unshift(loser)
-      runoff(votes, loser) 
-    end
-    @ranked_candidates.unshift(*ranked_candidates)
-  end
-
-  def runoff(votes, loser)
-    votes.each_pair do |candidate, morevotes|
-      hash = morevotes[1]
-      hash.each_pair do |vote, count|
-        hash.delete(vote)
-        vote.delete(loser)
-        hash[vote] = count
-      end
-    end
-    votes[loser][1].each_pair do |vote, count|
-      candidate = vote.shift
-      votes[candidate][0] += count
-      if votes[candidate][1].has_key?(vote)
-        votes[candidate][1][vote] += count
-      else
-        votes[candidate][1][vote] = count
-      end
-    end
-    votes.delete(loser)
-  end
-end