Hello Joffm,

I apologize for responding so far, some modifications were made to the survey that I have worked on so far.

What you mention above works correctly, with 20 products, it randomly takes 4 products selected in the exercise from the shelf but now that more products have been added to this shelf (now there are 29) it doesn't take these 4 random products. I don't know if in this case the "tString" script changes because there are more products.




<script type="text/javascript" charset="utf-8">

function shuffle(array) {
   var currentIndex = array.length, temporaryValue, randomIndex;
   // While there remain elements to shuffle...
   while (0 !== currentIndex) {
     // Pick a remaining element...
     randomIndex = Math.floor(Math.random() * currentIndex);
     currentIndex -= 1;
     // And swap it with the current element.
     temporaryValue = array[currentIndex];
     array[currentIndex] = array[randomIndex];
     array[randomIndex] = temporaryValue;
   }
   return array;
}

     $(document).on('ready pjax:scriptcomplete',function(){
// Fill the array
       var astring= $('#question{QID} input[type="text"]').val();
       var arr = astring.split("");
       arr = shuffle(arr);
       arr = arr.slice(0,4).join('');
       $('#question{QID} input[type="text"]').val('#'+arr);
       $('#question{QID}').hide();
    });
</script>




How could I randomly show 4 products out of the 29 that I am showing to the interviewee?

I remind you that unfortunately we continue with Version 2.50+ Build 160414

I also attach the ssl survey with the calculation questions.

Thank you very much Joffm and an affectionate greeting