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POAngularJs show/hide subheaders in ng-repeat
 

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  1. POAngularJs show/hide subheaders in ng-repeat
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    <p>I have an angularJS controller with a list of Events. Every event has Date and Comment. I'm displaying a list of events and want to hide the same dates.</p> <p>For instance if I have:</p> <pre><code>{Date: "10/1/2013", Comment= "First Event"}, {Date: "10/1/2013", Comment= "Second Event"}, {Date: "10/2/2013", Comment= "Third Event"} </code></pre> <p>The output should be:</p> <pre><code> 10/1/2013 Tuesday First Event Second Event 10/2/2013 Wednesday Third Event </code></pre> <p>Here is my template: </p> <pre><code>&lt;div data-ng-repeat="item in Events | filter:Filter | orderBy:SortBy:SortDesc"&gt; &lt;div data-ng-show="item.DisplayDate($index)" class="eventDate"&gt;{{ item.Date | date: 'M/dd/yyyy EEEE' }}&lt;/div&gt; &lt;div class="comment" ng-bind-html-unsafe="item.Comment"&gt;&lt;/div&gt; &lt;div style="clear:both"&gt;&lt;br /&gt;&lt;/div&gt; &lt;/div&gt; </code></pre> <p>I added a function to each Event item which compares event dates and if previous event has the same date returns false (hides Event Date div).</p> <pre><code> $scope.DisplayDate = function (idx) { if (idx &gt; 0) { //get previous event var previousEvt = $scope.Events[idx - 1]; //if previous event has the same date as this one - don't show subheader if (previousEvt.Date.getTime() == $scope.Events[idx].Date.getTime()) return false; else return true; } else return true; } </code></pre> <p>It works great if we do not apply filter or order to the Events array. If order/filter is applied - DisplayDate method is evaluated on original Events array (which is incorrect).</p> <p>The questions are:</p> <ol> <li>Is it possible to get access to filtered/ordered Events array in the DisplayDate method? </li> <li>Are there any other ways to show/hide group headers? I think I can apply some Date groupping and have two nested ng-repeats but it looks more complicated.</li> </ol> <p>Thanks,</p>
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    1. COProbably this would help: http://stackoverflow.com/questions/14866185/number-of-items-in-a-list-filtered-angularjs. You could create a filtered/ordered list and key on that instead of accessing $scope.Events, which is why it processes the original list all the time.
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      1. USrajasaur
    2. COI hound a great solution here: [link](http://stackoverflow.com/questions/11721863/angularjs-how-to-get-an-ngrepeat-filtered-result-reference) so I need to create custom filter, apply it to ng-repeat using '| [filterName] "[scope variable]"' syntax and then filtered array will be available in controller
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      1. USSergei Rudakov
    3. COdid you find a good solution?
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