anchor.diff:  
               <div class="filter-option row">
                   <div class="filter-option-label">
  -                    Hotel
  -                </div>
  -                <div class="filter-option-switch">
  -                    <input type="checkbox" data-toggle="toggle" data-on="Yes" data-off="No" data-onstyle="primary" data-size="mini" data-width="80" data-height="10">
  -                </div>
  -            </div>
  -
  -            <div class="filter-option row">
  -                <div class="filter-option-label">
  -                    Class
  -                </div>
  -                <div class="filter-option-switch">
  -                    <input type="checkbox" data-toggle="toggle" data-on="Business" data-off="Economy" data-onstyle="primary" data-size="mini" data-width="80" data-height="10">
  -                </div>
  -            </div>
  -
  -            <div class="filter-option row">
  -                <div class="filter-option-label">
                       Direct
                   </div>
                   <div class="filter-option-switch">
  
positive.code:             <button class="btn btn-default"  ng-click="next()">Next</button>
              <div ng-repeat="trip in trips | orderBy:'price'">
                  <div ng-if="trip_index == $index">
                      {{trip.price}} -- duration: {{trip.duration}}
                  </div>
              </div>
          </div>
  
negative.code:             <button class="btn btn-default"  ng-click="next()">Next</button>
              <div ng-repeat="trip in trips | orderBy:'duration'">
                  <div ng-if="trip_index == $index">
                      <div class="trip-template">
                          <div class="flight-template" ng-repeat="flight in trip.flights">
                              <div class="header-map">
                                  <span class="flight-carrier">{{flight.carrier_abbv}}</span>
                                  <span class="flight-date">{{flight.dep_time|date:fullDate}}</span>
                              </div>
                              <div class="flight-map">
                                  <span class="flight-origin">{{flight.airport_ori_code}}</span> --->
                                  <span class="flight-dest">{{flight.airport_dest_code}}</span>
                              </div>
                              <div class="schedule-map">
                                  <span class="flight-dep">{{flight.dep_time | date: 'shortTime'}}</span> --->
                                  <span class="flight-arr">{{flight.arr_time | date: 'shortTime'}}</span>
                              </div>
                          </div>
                      </div>
                      <span>{{trip.price}}</span>
                  </div>
              </div>
          </div>
  