AS3 platformer generation - arrays

Question

I am trying to infinitely generate platforms x distance in front of the player and I pretty much have no idea where to begin. Also they cannot "stack" on top of each other. Currently, what i have is below, there are no errors, though it takes up quite a bit of memory and my game lags to the point of crashing flash cs3
function enterFrameHandler(e:Event):void{
//gravitate the player
_vy += 1.5;
//move the player
Player.x += _vx;
Player.y += _vy;
//process collisions
processCollisions();
//Process other collisions
processOtherCollisions();
//scroll the stage
scrollStage();
//Process Key Presses
KeyHandler();
//Process Lives once
LifeHandler();
//Generate Objects
generateObjects();
}
//Function for generating objects
var ObjectArray:Array = [];
var ChildrenColliding:Boolean = false;
function generateObjects():void{
if(_vx > 0){
var Square:MovieClip;
Square = new mcSquare();
Square.x = Math.random() * 500 + Math.abs(_boundaries.x);
Square.y = Math.random() * stage.stageHeight/2.5 + (stage.stageHeight/2.5);
ObjectArray.push(Square);
_boundaries.addChild(Square);
}
for(var i in ObjectArray){
for(var a in ObjectArray){
if(ObjectArray[a].hitTestObject(ObjectArray[i]) && a != i){
ChildrenColliding = true;
}
}
while(ChildrenColliding){
ObjectArray[i].x = Math.random() * 500 + Math.abs(_boundaries.x);
ObjectArray[i].y = Math.random() * stage.stageHeight/2.5 + (stage.stageHeight/2.5);
}
}
}

Answer 1

The code you show here is fine. Setting ObjectArray as [] is perfectly safe and should not be null. There must be more to the story.
Can you post the rest of your code for this class? Do you have any other code that sets ObjectArray? There must be a line of code some other place that sets ObjectArray which is setting it to null.

Answer 2

Why not just:
ObjectArray.push(Square);