Loop through, conditionally display, and perform comparisons on different components of a date object

I am currently working on creating an event listing using Angular and I am facing a challenge. I want to dynamically add a year and month element between event listings based on changes in the year/month.

<body ng-controller="CalendarController">
 <div ng-repeat="event in events">
  <div ng-if="$first || year != prevYear ">
   {{event.date | date: 'yyyy'}}
  </div>
  <div>
   {{ event.name }}
  </div>
  <div>
   {{ event.date | date: 'shortTime'}}
  </div>
 </div>
</body>

In this code, if the element is the first one or if the year from the previous event differs from the current event's year, it will be preceded by a year element (and eventually the same for month).

(function(){
  var app = angular.module('a2Events', []);
  app.controller('CalendarController', function($scope, $http) {
    $http.get('../data.json')
         .success(function(data, status, headers, config) {
          angular.forEach(data, function(value, key) {
            value['date'] = Date.parse(value['date']);
          });
      $scope.events = data;
    })
    .error(function(data, status, headers, config) {
      console.log(status);
    });
  });
})();

Here, I am converting the date string into a date object retrieved from a JSON file containing a list of events sorted by date. My goal is to extract the year and month separately from the date objects (using $index) and use an ngif to conditionally add year/month elements where needed. However, I am having trouble accessing the date object as required. Any suggestions or alternative methods would be greatly appreciated.

The desired output should be:
2015
July
event1
event2
August
event3
event4
2016
January
event5
etc

Answer №1

My little secret was that I took a shortcut

ng-if="currentEvent.year !== events[index - 1].year"

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