What is the best way to retrieve the distinct number within an ng-repeat loop?

Utilizing angular ng-repeat to display the bootstrap tab, I have nested tabs within one another. In order to assign a unique id to both the tab element and its content, I am currently using $index as a way to achieve this. However, it proves ineffective when there are more than two tabs within the parent tab.

var items = ['hello1', 'hello2', 'hello3'];

<ul>
  <li id="yui{{$index+1}}" ng-repeat="item in items"></li>
</ul>

I am seeking an alternative method to provide a unique id to each item without relying on $index. Are there any other ways to accomplish this?

<ul>
      <li id="yui1">hello1</li>
      <li id="yui2">hello2</li>
      <li id="yui3">hello3</li>
    </ul>

Answer №1

One can also retrieve the unique index of the parent element, which means that in this particular scenario it will look similar to:

<li id="{{ $parent.$index }}_{{ $index + 1 }} ....

Answer №2

If you want to establish a unique identification number or retrieve a unique string, one approach is to create a versatile angularJS Filter. This filter can take in optional parameters such as a prefix, $index, or suffix, and then generate the unique string accordingly. For instance -

 angular.module('myApp',[ngRoute]).filter('unique',function(){

    return function(input,prefix){
    var uniqueID = '';
    // code to generate unique string goes here
    return uniqueID;
    }
});

After creating the filter, you can utilize it within your view like so -

<li id="{{$index | unique:'tab_'}}">test1</li>

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