AS3 do 3 random stops, that are never equal to one another - actionscript-3

Question

I have 3 movieclips, each one has 7 frames and labels that play different images, I want to stop each one randomly, but never have them equal the same frame. I was thinking array.push once its called, but I dont know how to do that. So I have this so far:
function startGame(event:MouseEvent)
{
addChild(level6_mc);
addChild(inGameNav_mc);
level6_mc.gotoAndPlay(2);
var timer = setTimeout(startAgain, 1000);
startAgain();
}
// level 6
function startAgain()
{
var randomNumber:Number= Math.floor(Math.random()*7);
var door1 = level6_mc.door1_mc;
var door2 = level6_mc.door2_mc;
var door3 = level6_mc.door3_mc;
door1.gotoAndStop(randomNumber);
door2.gotoAndStop(randomNumber);
door3.gotoAndStop(randomNumber);
}
there has to be an easy way for this, I just cant figure it out. I have been looking all over the net for a solution, but every method is just so complicated. Can anyone help me find a simple solution, and if you tell me to use an array can you please give example. Thanks in advance

Answer 1

I would opt for an approach like this:
function startGame(event:MouseEvent){
addChild(level6_mc);
addChild(inGameNav_mc);
level6_mc.gotoAndPlay(2);
var timer= setTimeout(startAgain, 1000);
startAgain();
}
function startAgain(){
var randomFrames:Array = getRandomFrames(3);
var door1 = level6_mc.door1_mc;
var door2 = level6_mc.door2_mc;
var door3 = level6_mc.door3_mc;
door1.gotoAndStop(randomFrames[0]);
door2.gotoAndStop(randomFrames[1]);
door3.gotoAndStop(randomFrames[2]);
}
/*
Given input of 3, the return should be an array of integers randomly
chosen from the array defined by `frames`. An example would be `[5,2,7]`
*/
function getRandomFrames(var $frameCount:Number):Array {
var frames:Array = [1, 2, 3, 4, 5, 6, 7]
var randomFrames:Array = new Array(Math.min($frameCount, frames.length));
var pos:Number = 0;
for (var i:int = 0; i < randomFrames.length; i++)
{
pos = int(Math.random() * frames.length);
randomFrames[i] = frames.splice(pos, 1)[0];
}
return randomFrames
}
I don't have Flash on this machine, so I can't test. But the idea is that you have an array of frame numbers, 1-7 and you randomly choose 3 of those numbers to be your stop frames.

Answer 2

Since its a small frame count, you can splice the frames out of an array:
function startGame(event:MouseEvent){
addChild(level6_mc);
addChild(inGameNav_mc);
level6_mc.gotoAndPlay(2);
var timer= setTimeout(startAgain, 1000);
startAgain();
}
//level 6
function startAgain(){
var door1 = level6_mc.door1_mc;
var door2 = level6_mc.door2_mc;
var door3 = level6_mc.door3_mc;
var stopsAt:Array = [1,2,3,4,5,6];
door1.gotoAndStop(stopsAt.splice(Math.random()*stopsAt.length, 1)[0]);
door2.gotoAndStop(stopsAt.splice(Math.random()*stopsAt.length, 1)[0]);
door3.gotoAndStop(stopsAt.splice(Math.random()*stopsAt.length, 1)[0]);

Answer 3

var prevNum:int = 0;
function startGame(event:MouseEvent)
{
addChild(level6_mc);
addChild(inGameNav_mc);
level6_mc.gotoAndPlay(2);
var timer = setTimeout(startAgain, 1000);
startAgain();
}
// level 6
function startAgain()
{
var randomNumber:int= getRandomNumber(7,prevNum);
prevNum = randomNumber;
var door1 = level6_mc.door1_mc;
var door2 = level6_mc.door2_mc;
var door3 = level6_mc.door3_mc;
door1.gotoAndStop(randomNumber);
door2.gotoAndStop(randomNumber);
door3.gotoAndStop(randomNumber);
}
function getRandomNumber(length:int,previousNumber:int):int
{
var currentNumber:int;
do{
currentNumber = Math.floor(1+Math.random()*length);
}while(currentNumber==previousNumber);
return currentNumber;
}