Seems to be an ispiring question/problem!
Eric - if you'd go with the combo - Strings - these are the 16 possible
combinations:
,a,ab,abc,abcd,abd,ac,acd,ad,b,bc,bcd,bd,c,cd,d
(first one is an empty string if a && b && c && d are false)
I'm not overly proud of how I found the combinations, but sometimes nothing
beats brute force :-)
arr = ['a','b','c','d'];
numElems = arr.length;
combos = new Array();
c=0;
while(c<100000){
combo = '';
for(var i=0; i<numElems; i++){
if(Math.random() < 0.5){
combo += arr[i];
}
}
inArray = false;
for(var i=0, len=combos.length; i<len; i++){
if(combo == combos[i]){
inArray = true;
break
}
}
if(!inArray){
combos.push(combo);
}
c++;
}
combos.sort();
trace(combos);
trace(combos.length);
--------------
Andreas Weber
motiondraw.com
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Martin
Wood
Sent: Wednesday, January 25, 2006 8:05 PM
To: Flashcoders mailing list
Subject: Re: [Flashcoders] checking combinations
i've got to go out now so cant give the full answer i have in my head,
but one way of tackling it is to make each state variable's value a
power of 2
a = 1
b = 2
c = 4
d = 8
then you know that any combination of them has a unique value. (its
basically a 4 bit number)
then to handle the dispatch depending on the state combination you can
build a function table.
functionTable = new Array();
// create a handler for the combination a + b
functionTable[a + b] = Delegate.create(this,combinationAB);
and when you check the variables just call the function directly from
the table :
// a,b,c,d are just passed as boolean flags here
function handleUpdate(a:boolean,b:boolean,c:boolean,d:boolean)
{
// taking advantage of a true being 1 in flash
// and ideally you would setup these numbers
// as static class variables
var state = a + (b * 2) + (c * 4) + (d * 8);
// call the defined function
functionTable[state]();
}
of course you could do a check first to see if the function is defined
and do something like log a warning or whatever is appropriate for your
situation.
hope that makes sense.
martin
_______________________________________________
Flashcoders mailing list
[email protected]
http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
