AngularJS Count within nested ng-repeat

Question

I am looking for a way to count the amount of 'td' elements created in a loop.

I can't use $index for this as on each row the index gets reset, what is the cleanest and simplest way to to set i on each iteration. So the first column value is 1 & the first column count 0.

My Code so far:

        <table class="calendar">
            <thead>
                <tr>
                    <th>M</th>
                    <th>T</th>
                    <th>W</th>
                    <th>T</th>
                    <th>F</th>
                    <th>S</th>
                    <th>S</th>
                </tr>
            </thead>
            <tbody ng-click="bindCellValue($event)">
                <tr ng-repeat="week in (days.length/7 | array)">
                    <td ng-repeat="day in days.slice(7*$index, 7*$index + 7) track by $index">
                        {{ day }}
                        <i class="icon ion-checkmark answer-correct" ng-if="submitted && answers[i].correct"></i>
                        <i class="icon ion-close answer-wrong" ng-if="submitted && !answers[i].correct"></i>
                    </td>
                </tr>

            </tbody>
        </table>

and in my controller:

$scope.days = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, null, null, null, null ];

Answer 1

You can use ng-init .

<tr ng-repeat="week in (days.length/7 | array)" ng-init="w = $index">
    <td ng-repeat="day in days.slice(7*$index, 7*$index + 7) track by $index" ng-init="i = w*7 + $index">
        {{ day }}
        <i class="icon ion-checkmark answer-correct" ng-if="submitted && answers[i].correct"></i>
        <i class="icon ion-close answer-wrong" ng-if="submitted && !answers[i].correct"></i>
    </td>
 </tr>

Answer 2

Should be something like this:

<i class="icon ion-checkmark answer-correct" ng-if="submitted && answers[$parent.$parent.$index * 7 + $parent.$index].correct"></i>

Basically, take the $parents index (the one where you create the week) multiply it by 7 and then add the other $index in. I suggest outputting that until you're sure it's right.