javascript - Is it possible to .sort(compare) and .reverse an array in angularfire?

Question

Update: The problem I'm having is doing a combination of three things:

1. Adding a header to an array when the $priority (set to date created) changes. This is so I can group tasks by week and day in an ng-repeat.
2. Resorting that list when a task is checked. Checked tasks should go to the bottom.
3. When creating new tasks, I need to add them to the top of the list instead of the bottom.

Here is a plnkr of all the code: http://plnkr.co/edit/A8lDKbNvhcSzbWVrysVm

I'm using a priorityChanged function to add a header based on comparing the dates on a task: //controller var last = null; $scope.priorityChanged = function(priority) { var current = moment(priority).startOf('day'); var changed = last === null || !last.isSame(current); last = current; return changed; };

//view
<li ng-repeat="task in list track by task.$id">
  <h3 ng-show="priorityChanged(task.$priority)">{{getDayName(task.$priority)}}</h3>

and to move a task to the bottom of the list when a task is completed I am using a .sort function when I populate the task list:

var populateTasks = function(start, end) {
    $scope.start = start;
    $scope.end = end;
    var ref = new Firebase('https://plnkr.firebaseio.com/tasks').startAt(start).endAt(end);
    var list = $firebase(ref).$asArray();

    list.sort(compare);

    list.$watch(function() {
      list.sort(compare);
    });

    function compare(a, b) {
      return a.completeTime - b.completeTime;
    }

    $scope.list = list;

  };

It seems as though these approaches will not work together. Is there a way of combining them so that when the list is re-sorted the ng-repeat will run through the tasks again and add the necessary headers? Is that the ideal solution? Can the header be separate?

Update: I moved the ng-init functionality directly into the h3 to try to get that to run again but it does not display the header in that case.

Update2: The header does seem to show up if at least two of the $priority dates are unique but I still have the problem of deleting or moving the associated list item removing the connected header.

Answer 1

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