Question

i get Error #1010 when i use this while loop:

while (pos.length>0)
{
    coo = pos.splice(Math.floor(Math.random() * pos.length),1)[0];

    (pos_array[index]).x = coo.x;
    (pos_array[index]).y = coo.y;
    index++;
}

The error says: A term is undefined and has no properties.

What is wrong with my loop because I used the same loop for other programms and i got no such error.

Thank you for your attention.

Answer 1

Your while loop is breaking.

pos.length will never change and eventually pos_array[index] will be out of bounds.

When when you are out of bounds it is undefined.
So basically you are doing.

undefined.x = coo.x;

And just like the error says undefined has has no properties.

I can’t see how this loop ever worked.

Try this instead much cleaner

var savedX:Number = 0
for each( var obj:Object in pos_array ){
  coo = new MovieClip()
  coo = pos.splice(Math.floor(Math.random() * pos.length),1)[0];
  obj.x = savedX;
  obj.y = 0;
  savedX += coo.width;
}