How do you detect collisions between two arrays? - actionscript-3

Question

For future refrence this was the final code
for each (var bullet:Bullet in bulletList)
{
for each (var zombie:Zombie in zombieList)
{
if (zombie.hitTestObject(bullet))
{
stage.removeChild(bullet);
zombie.zombieShot(50);
}
}
}
Original Question Below
for each (var bullet:Bullet in bulletList)
{
if (zombieList.length > 0)
{
if (zombieList[h].hitTestObject(bullet))
{
bulletList[i].deleteBullet();
zombieList[h].zombieShot(50);
}
}
}
This is the code I have but it only detects the first zombie I spawn in, any help is appreciated.
if (countMePls<10)
{
countMePls++;
var zombie:Zombie = new Zombie(stage,Math.random() * stage.width,Math.random()*stage.height);
zombie.addEventListener(Event.REMOVED_FROM_STAGE,zombieRemoved,false,0,true);
zombieList.push(zombie);
stage.addChild(zombie);
}
and then...
function shootBullet():void
{
var bullet:Bullet = new Bullet(stage,Main.player.x,Main.player.y,Main.player.rotation - 90);
bullet.addEventListener(Event.REMOVED_FROM_STAGE,bulletRemoved,false,0,true);
bulletList.push(bullet);
stage.addChildAt(bullet,1);
}
this last bit is in Bullet.as
public function deleteBullet():void
{
this.parent.removeChild(this)
}

Answer 1

I think your issue comes from some basic confusion about for and for each. With for each you have no index variable, each iteration yields a new instance of the type in the collection which is referred to by the name you declare in the loop. In this case that is;
foreach (var bullet in bulletsList)
{
// do something with bullet
}
You probably actually want a nested loop, something that checks every bullet against each zombie to see if there was a hit, that would actually look like this;
foreach (var bullt in bulletsList)
{
foreach (var zombie in zombiesList)
{
if (zombie.hitTestObject(bullet))
{
bulletList.Remove(bullet);
zombie.zombieShot(50);
}
}
}
In your code you have the foreach loop giving you the current bullet object but then you never reference it within the loop, that doesn't make sense. This may not be exactly what you want but hopefully it will get you moving in the right direction. If you want to use those indexers then you need something like;
for (int i = 0; i < bulletsList.Length; i++)
{
for (int h = 0; h < zombiesList.Length; h++)
{
// do stuff with bulletsList[i] and zombiesList[h]
}
}
Note: this was originally tagged as C# and the code I've posted uses C# syntax. The explanation I've provided most likely applies either way, the OP's code doesn't really makes sense in any language I know of and the reasons are the same.