How to randomize subset of array in Javascript?
<p>What is the best way to randomize part of the array in Javascript</p>

<p>For example, if I have 100 items in the array, what is the fast and efficient way of randomizing set of every 10 times. Items between 0 and 9 is randomize within data items[0] to items[9]. Items between 10 to 19 are randomize within data items[10] to items[19] and so on.. </p>
