Removing items from an Array in for loop

programming flash
1

This is not a question of what command to use. I could pop, shift, splice or slice it out of there (hey, that had a nice ring to it…)

My question is how to properly remove items from an array while in the middle of a for loop:

//This will cause errors, because if the condition is met, it will skip the next array in line
for (var i:int = 0; i < arr.length; i++)
{
   if (arr*.alpha <= 0)
   {
      arr.splice(i, 1);
   }
}

So, what is the most common workaround? This might work:

//This will cause errors, because if the condition is met, it will skip the next array in line
for (var i:int = 0; i < arr.length; i++)
{
   if (arr*.alpha <= 0)
   {
      arr.splice(i, 1);
      i--;
   }
}

Silly question, but is this the ideal or most common way to do it? If someone is reading through my code, will they understand what I am doing without me having to clarify with comments each time?