gistfile1.txt

  def self.treeify_comments(clist, pid = 0)
        chash = Hash.new        # comments grouped by parent_id
        comhash = Hash.new      # comments in a hash, w/ comment id as key
        comments = Array.new    # for the ordered comments
        depth_tree = Hash.new   # comment depth

        clist.collect { |x| comhash[x.id] = x }
        # ?
        clist.collect do |c|
                chash[c.parent_id] ||= Array.new
                chash[c.parent_id] << c.id
        end
        cproc = lambda { |s| unless (chash[s].nil?); chash[s].collect { |i| comments << comhash[i]; cproc.call(i) } end }
        # this might generalize it?
        cproc.call(pid)
        # better as collect? Maybe
        comments.collect { |c| depth_tree[c.id] = (depth_tree[c.parent_id].nil?) ? 0 : depth_tree[c.parent_id] + 1 }

        # send back
        return [ comments, depth_tree ]
  
  end