TMC speedrun winners query

gistfile1.rb

c = Course.find(21)
available = AvailablePoint.course_points(c).map(&:name).sort
user_times = User.all.map do |u|
  pts = u.awarded_points.where(:course_id => c.id).includes(:submission)
  raise 'wtf' if pts.uniq != pts
  if pts.map(&:name).sort == available
    last = pts.map(&:submission).map(&:created_at).max
    [u.username, last]
  else
    nil
  end
end.reject(&:nil?).sort_by(&:second)

user_times.size
puts user_times.take(5).join("\n"); nil