Error using Arrays

Question

I am trying to use Array to count my boxMC. my boxMC is on my background of WorldMC. Its saying that my line of

"for (var count=0; count<boxMC.length; count++){

boxMC[count].update();

}"

Has no default value

Here is my error:

ReferenceError: Error #1069: Property update not found on tankscript.turrent.Box and there is no default value.

var boxMC:Array;

boxMC = new Array();

//------------------------------

// -----Box Spawning------------

//------------------------------

//only spawn a box if there are less tan 100 already on screen

while(WorldMC.numChildren<10)

{

// Make a new instance of the box class

var bx = new Box();

// add the box to the display list

WorldMC.addChild(bx);

//position and rotate the Box;

bx.x = Math.random() * -1100;

bx.y = Math.random() * 1;

bx.rotation = 40;

// add the box to list of box

boxMC.push(bx);

}

for (var count=0; count<boxMC.length; count++){

boxMC[count].update();

}

kglad · Accepted Answer

I should learn sorry.

and its

MovieClip(parent).bulletMC.push(b);

its saying its undefined and has no properties

so either parent or bulletMC or b is undefined.

you can rule out b being the problem because you can see it's defined a few lines above the problematic line of code.

ntl, you can confirm and pinpoint the problem by using the trace() function. if you read the documents on how to debug you'll see it is, by far, the most important tool used in debugging actionscript.

so, just above the problematic line of code use:

trace(parent,b,bulletMC);

you'll probably find the problem is parent because you're calling fire before the class element is added to the stage. ie, before it has a parent. to fix that, make sure your addChild() is executed before fire() is called.

brendenc14282108 · Answer

Alrighty everything should be fine now, but NEW ERROR like always...

Game Development in AS3 Part 7 - Hit tests and bugs galore - YouTube

its right at the beginning of the video is what im trying to do. but when he got his "MovieClip(parent).bulletMC.push(b);" to work mine gives me an error of.

TypeError: Error #1010: A term is undefined and has no properties.

at tankscript.turrent::Turrent/fire()

i did move my

var bulletMC:Array;

bulletMC = new Array();

to where they are supposed to be. This is the code its not liking:

private function fire(m:MouseEvent)

{

trace("Fired!");

//if we're allowed to shoot

if (shotCooldown<=0)

{

// reset the cooldown

shotCooldown = MAX_COOLDOWN;

//spawn a bullet

var b = new Bullet();

// set the position and roation of the bullet

b.rotation = rotation;

b.x = x;

b.y = y;

// add bullets to list of bullets

MovieClip(parent).bulletMC.push(b);

// add the bullet to the parent

parent.addChild(b);

// play firing animation

play();

}

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