Moving objects on the stage - actionscript-3

Question

Let's say I have 5 objects in an array and I move all them along x-axis like this:
vx = 5;
for (i:int = 0; i < objects.length; i++)
{
objects[i].x += vx;
}
I would like to make this.
If any object from array 'objects' hit PointA, move all objects from that array to left side, for example set vx *= -1;
I can make only this:
for (i:int = 0; i < objects.length; i++)
{
// move right
objects[i].x += vx;
if (objects[i].hitTest(PointA))
{
// move left
vx *= -1;
}
}
This will change object's direction, but I need to wait all objets hit PointA.
How to change the direction of all objects in array, if any of them hit PointA?

Answer 1

I don't know action script but you should set a boolean outside the for loop, like bGoingRight
Check that this is true and move objects right, if its false move the objects left. When you pass the hitTest you should changed the boolean to false.
Rough Example
var bGoRight:Boolean = true;
for (i:int = 0; i < objects.length; i++)
{
if(bGoRight)
{
// move right
objects[i].x += vx;
}
else
{
// move left
vx *= -1;
}
if (objects[i].hitTest(PointA))
{
// if any object hit the point, set the flag to move left
bGoRight = false;
}
}

Answer 2

So you'll need to check the objects that have already hit PointA, store them, then check if the updated storage count is equivalent to your objects array. Then when that case is satisfied you can change the vx variable. This could look something like this:
//set a variable for storing collided object references
//note: if you are doing this in the IDE remove the 'private' attribute
private var _contactList:Array = [];
for (i:int = 0; i < objects.length; i++)
{
// move right
objects[i].x += vx;
if (objects[i].hitTest(PointA))
{
if( contactList.length == objects.length ) {
// move left
vx *= -1;
//clear our contact list
contactList.length = 0;
}
else if ( noContact( objects[i] ) ) {
contactList.push( objects[i] );
}
}
}
Then the function in the else if statement noContact(), again if you are doing this in the IDE you will need to remove the private attribute.
private function noContact( obj:* ):Boolean {
if ( contactList.indexOf( obj ) != -1 ) {
return false;
}
return true;
}
Another way you can do this is like this (a boolean way as stated in the other answer), but is reliant on your storage setup correct:
//set this variable for directionRight (boolean)
private var directionRight:Boolean = true;
for (i:int = 0; i < objects.length; i++)
{
// move right
objects[i].x += vx;
if (objects[i].hitTest(PointA))
{
//we are moving to the right, object[i] is the last object
if( i == objects.length-1 && directionRight ) {
// move left
directionRight = !directionRight;
vx *= -1;
}
else if ( i == 0 && !directionRight ) ) {
// move right
directionRight = !directionRight;
vx *= -1;
}
}
}