Moving pipes query in a Flappy Bird game - arrays

Question

I am trying to build a Flappy Bird like game in Adobe Flash, using Action Script 3 as a school project. I am using an array of Pipe objects to create the number of Pipes for each level (at this stage my code is with one level/stage).
I have one problem though, after I created the array of Pipes and them added each Pipe object to the stage, I tried to use other function to move the pipes, iterating through the array and changing the x dimension value to every Pipe object, but it doesn't work.
Here is my code:
import flash.events.MouseEvent;
stop();
Bird_mc.stop();
//array of pipes;
var pipeArray:Vector.<Pipe > = new Vector.<Pipe > ;
var birdVelocity:int = 0;
var stageGravity:int = 2;
stage.addEventListener(Event.ENTER_FRAME,birdFall);
stage.addEventListener(Event.ENTER_FRAME,createPipesAndLines);
stage.addEventListener(Event.ENTER_FRAME,movePipesAndLines);
stage.addEventListener(MouseEvent.CLICK,birdFly);
function birdFall(event:Event):void
{
Bird_mc.y += birdVelocity;
birdVelocity += stageGravity;
}
function birdFly(event:MouseEvent):void
{
birdVelocity = -16;
Bird_mc.play();
}
/*Move Pipes and Lines to the left - TO BE MADE*/
function createPipesAndLines(event:Event):void
{
for (var i:int = 0; i<10; i++)
{ //use of of-else to separate the pipes up and down and rotate em
if (i%2==0)
{
pipeArray.push(new Pipe());
addChild(pipeArray[i]);
pipeArray[i].x = i * 250;
pipeArray[i].y = 50;
}
else
{
var tempPipe:Pipe = new Pipe();
tempPipe.rotation = 180;
pipeArray.push(tempPipe);
addChild(pipeArray[i]);
pipeArray[i].x = i * 300;
pipeArray[i].y = 400;
}
}
}
//move the pipes to left
function movePipesAndLines(event:Event):void
{
for (var i:int = 0; i<10; i++)
{
pipeArray[i].x -= 0.5;
}
}

Answer 1

Firstly I'd recommend having a single event function that calls every other function that need updating.
stage.addEventListener(Event.ENTER_FRAME, loop);
function loop(event:Event):void {
birdFall();
birdFly();
movePipesAndLines();
}
Secondly you don't really want to add all pipes from the start of the game. I would imagine Flappy Bird attaches new Pipe objects as the screen moves. It's a whole lot more efficient that way.
Other than that the code looks good. I would however like to see what's inside the Pipe object. Perhaps Pipe.x is an int instead of Number?