This script will randomize the column order in an array-numbers question in LS version 3.x:
Code:
<script type="text/javascript" charset="utf-8">
$(document).on('ready pjax:scriptcomplete',function(){
randomArrayNumCols({QID});
});
// A function to randomize columns in an array-numbers question
function randomArrayNumCols(qID){
var thisQuestion = $('#question'+qID);
// Index the array columns
$('table.subquestion-list tr', thisQuestion).each(function(i) {
$('> *', this).each(function(i) {
$(this).attr('data-index', i);
});
});
// Create an array of the columns
var columns = [];
$('table.subquestion-list tr[id^="javatbd"]:eq(0) td.answer-item', thisQuestion).each(function(i) {
columns.push($(this).attr('data-index'));
});
// Shuffle the columns array
columns = $.shuffle(columns);
// Reposition the row elements
$('table.subquestion-list tr', thisQuestion).each(function(i) {
var thisRow = $(this);
$(columns).each(function(i, val) {
thisRow.append($('[data-index="'+val+'"]', thisRow));
thisRow.append($('.col-no-answer', thisRow));
});
});
}
// A function to shuffle elements or contents of arrays
(function($){
$.fn.shuffle = function() {
return this.each(function(){
var items = $(this).children();
return (items.length)
? $(this).html($.shuffle(items))
: this;
});
}
$.shuffle = function(arr) {
for(
var j, x, i = arr.length; i;
j = parseInt(Math.random() * i),
x = arr[--i], arr[i] = arr[j], arr[j] = x
);
return arr;
}
})(jQuery);
</script>
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