Angular Js Ng-repeat Choose Random Grouping From Array?

I have an array of 6 objects. I have a list with an ng-repeat where I want to display 3 unique items from those 6 items. One each refresh, it might pull 3 different items, but it

Solution 1:

User random and limitTo filters.

<png-repeat="i in list|orderBy:random|limitTo:3">{{i}}</p>

Solution 2:

This answer is a good start for a filter but there are problems with it (see the comments). I would delete the answer but the comments may be useful to someone in the future. My new answer is a better way to solve this problem for now.

You can use a custom filter:

.filter('randomSample', function() {
    returnfunction(array, length) {
        var copy = angular.copy(array);
        var sample = [];
        while(sample.length < length) {
            var randomIndex = Math.floor(Math.random() * (copy.length));
            sample.push(copy.splice(randomIndex, 1)[0]);
        }
        return sample;
    };
})

Use it like:

<ling-repeat="item in array | randomSample:3">{{ item }}</li>

Here's an example on plnkr: http://plnkr.co/edit/NgsQlvgrCD7vLXnBC7q1?p=preview

Solution 3:

After many attempts, it looks like it is better to get the random values in your controller after the array is populated. Like so:

_this.sample = [];
var copy = angular.copy(_this.testimonials);
while(_this.sample.length < 3) {
    var randomIndex = Math.floor(Math.random() * (copy.length));
    _this.sample.push(copy.splice(randomIndex, 1)[0]);
}

Then just ng-repeat="user in home.sample"