Is there a way to locate the final element in a specific angular ng-repeat loop subset?

The final entry in the labels section may not be checked, making $last unsuitable for this scenario. This results in the following sequence: peaches, bananas, cherries, watermelon,

How can I locate the last item in an angular ng-repeat loop while using an ng-if as a filter, and add a comma to all items except the last one that is checked within the list?

I possess an array of values that will be combined in my user interface. A mock sample array looks like this:

model.labels = {
    value0: {
        label: 'peaches',
        checked: true
    },
    value1: {
        label: 'apples',
        checked: false
    },
    value2: {
        label: 'bananas',
        checked: true
    },
    value3: {
        label: 'cherries',
        checked: true
    },
    value4: {
        label: 'watermelon',
        checked: true
    },
    value5: {
        label: 'plums',
        checked: false
    },
    value6: {
        label: 'mangos',
        checked: false
    }
}

Mainly, I desire to display what is currently visible in my UI with the only difference being that the last element in the labels section might not be checked, rendering $last ineffective:

<span ng-repeat="label in model.labels" ng-if="label.checked">
{{label.label}}{{$last ? '' : ', '}}
</span>

I have contemplated implementing a custom filter, introducing a new data object to the model in the controller that includes a pre-combined string, as well as an HTML approach using a repeated span containing a hidden comma utilizing span:last-of-type. I want to understand if there exists a solution without resorting to any of these three methods.

Answer №1

Utilizing filters would enable you to accomplish this:

<span ng-repeat="label in model.labels | filter:{checked: true}">
    {{label.label}}{{$last ? '' : ', '}}
</span>

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