Is it correct to use JavaScript Array.sort() method for shuffling?

Question

I was helping somebody out with his JavaScript code and my eyes were caught by a section that looked like that:

function randOrd(){
  return (Math.round(Math         


        

Answer 1

There is nothing wrong with it.

The function you pass to .sort() usually looks something like

function sortingFunc( first, second )
{
  // example:
  return first - second ;
}

Your job in sortingFunc is to return:

• a negative number if first goes before second
• a positive number if first should go after second
• and 0 if they are completely equal

The above sorting function puts things in order.

If you return -'s and +'s randomly as what you have, you get a random ordering.

Like in MySQL:

SELECT * from table ORDER BY rand()