as3 array error #1010 - arrays

Question

im basically trying to make a mini game where you have to dodge the oncoming objects by using the on-screen buttons (button left and right of the screen) it worked fine when i did it with an individual object then i decided to have more objects and make an array to hold them. thats when the error accrued.
the error is :
TypeError: Error #1010: A term is undefined and has no properties.at Untitled_fla::MainTimeline/cyclespeed()

Answer 1

Your cycle Array has 5 elements starting by the index 0 and ending by 4 :
... Array indices are zero-based, which means that the first element in the array is [0], the second element is [1], and so on.
That's why your for loop should be like this :
for (var i:int = 0; i < 5; i++) { }
OR
for (var i:int = 0; i <= 4; i++) { }
OR simply
for (var i:int = 0; i < cycle.length; i++) { }
In your cyclespeed function, the value of your i var will be always 5, which is the last value assigned to it in your for loop, and of course cercle[5] didn't exist that's why you got the TypeError: Error #1010: A term is undefined and has no properties : cercle[5] is undefined and has not an x property.
In your case you can use only one Event.ENTER_FRAME listener to do all the job like this :
stage.addEventListener(Event.ENTER_FRAME, onEnterThisFrame);
function onEnterThisFrame(e:Event):void {
box_MC.x -= 1;
for (var i:int = 0; i < cycle.length; i++) {
cycle[i].x += 1;
if(box_MC.hitTestObject(cycle[i])) {
trace ("true");
box_MC.x += 4;
}
}
if (movingdown == 1) {
box_MC.y -= 4.5;
} else if (movingup == 1) {
box_MC.y += 4.5;
}
}
Hope that can help.

Answer 2

I don't have enough rep points to comment, so I'll critique what I saw in your code.
There are quite a few things wrong with the code.
This was declared twice, once in a for loop and one outside of the functions
addEventListener(Event.ENTER_FRAME, cyclespeed);
You attached the "handleCollision" event to the stage and not a movieclip.
handleCollision refers to "cycle[i]" but i is out of scope since it is not apart of the for loop where i has been declared
function handleCollision( e:Event) : void {
if(box_MC.hitTestObject(cycle[**i**])) {
trace ("true");
box_MC.x += 4;
}
}
I would suggest building each piece one at a time because it seems like you are trying to do a lot at once, without actually getting anything to work.