<select name="region" id="region" ng-options="id as name for (id, name) in regions[entry.country]" ng-model="entry.region" class="form-control select-styled" required></select>
如果entry.region等于Japnese,我想使用某种过滤器或自定义排序来对区域进行排序。目前选项按键显示,我想按值(日语字母)对它们进行排序?知道怎么开始吗?