ReferenceError: Error #1069 Actionscript 3 - arrays

Question

So i have been stuck on this for about 2 weeks and i have no idea how to progress.
I have an array of movie clips called "_main.speederArray" and i'm trying to make it so that if they collide with each other then they are both destroyed. Here is my code in the "Speeder class" to detect collision.
private function detectionHandler():void{
//trace("array length", _main.speederArray.length);
detectionID = _main.gameCounter;
for ( var i:int = _main.speederArray.length -1; i >= 0; i--){
var speeder:Speeder = _main.speederArray[i];
if(speeder.destroyMe) continue;
if(speeder.detectionID == this.detectionID) continue;
if (boxIntersect(this, speeder)){
trace("collision");
destroyMe = true;
speeder.destroyMe = true;
}
}
}
Here is the boxIntersect function this code refers to. It's in the same class
private function boxIntersect ( speeder1:Speeder, speeder2:Speeder):Boolean{
if(speeder1.x + speeder1.distRight < speeder2.x + speeder2.distLeft) return false; //checking for overlap on X axis
if(speeder1.x + speeder1.distLeft > speeder2.x + speeder2.distRight) return false;
if(speeder1.y + speeder1.distBot < speeder2.y + speeder2.distTop) return false; // checking for overlap on Y axis
if(speeder1.y + speeder1.distTop > speeder2.y + speeder2.distBot) return false;
return true;
}
And then here is where i think the problem is. I have a class called "spawner" and this is where i was going to handle the objects being created and destroyed. Here is the code where i am trying to splice objects from the array depending on whether the destroyMe bool is set to true. At this stage i have confused the shit out of myself so any help would be greatly appreciated!
private function updateArray(e:Event):void{
for(var i:int = _main.speederArray.length - 1; i>=0; i--){
var speeder:Speeder = _main.speederArray[i];
if(speeder.destroyMe){
//trace("hello");
removeChild(speeder[i]); // take it off the stage
_main.speederArray[i] = null;
_main.speederArray.splice(i, 1); //remove it from the array
}
}
}
Now, the game runs however as soon as the 2 objects within the same array collide, i get the collision trace in the output window but straight after i get this :
ReferenceError: Error #1069: Property 1 not found on com.game.Speeder and there is no default value.
at com.game::Spawner/updateArray()
No idea what it means :(
Any help appreciated thanks guys!

Answer 1

The problem comes from the line
removeChild(speeder[i]); inside your update function.
Speeder has no properties that are called 1 and the 1 comes obviously from your for loop.
So, to solve this problem, you should simply call
removeChild(speeder);
speeder already is the object at the position i of your array. Putting [] behind an object is the same like accessing a property from it. essentially you were doing this:
removeChild(speeder.1);