No problem!
2011/1/13 natalia Vikhtinskaya <natavi.m...@gmail.com>
> THANK YOU AGAIN!!!
>
> 2011/1/13 Juan Pablo Califano <califa010.flashcod...@gmail.com>:
> > PS:
> >
> > I mentioned that a random sort was not the best approach.
> >
> > Here's a better way to randomize an array:
> >
> > public static function shuffle(array:Array):void {
> > var tmp:*;
> > var cur:int;
> > var top:int;
> >
> > cur = top = array.length;
> > if(top) {
> > while(--top) {
> > cur = Math.floor(Math.random() * (top + 1));
> > tmp = array[cur];
> > array[cur] = array[top];
> > array[top] = tmp;
> > }
> > }
> > }
> >
> >
> > 2011/1/13 Juan Pablo Califano <califa010.flashcod...@gmail.com>
> >
> >> Try this:
> >>
> >> function uniqueRandomInt(min:Number, max:Number, n:Number) {
> >> var a:Array = [];
> >> var i:Number = min;
> >> while (a.push(i++)<max);
> >> a.sort(function (a:Number, b:Number) {
> >> return Math.floor(Math.random()*3)-1;
> >>
> >> });
> >> return a.slice(0,n);
> >> }
> >>
> >> Although a random sort is not the best means to randomize an array, it
> >> should work reasonably.
> >>
> >> The problem with your code was this line:
> >>
> >> Math.random()*2-1;
> >>
> >> Your sort function should return 3 diferent values (n < 1, n = 0 and; n
> >
> >> 0) as evenly distributed as possible. Math.random gives you a number
> that
> >> is great or equal to 0 and *less* than 1. It will not give you 1 back
> >> (0.999999999, but not 1).
> >>
> >> So if you do:
> >>
> >> Math.random() * 2
> >>
> >> You'll either get 0 or 1 (with decimals); it's not posibble to get 2.
> You
> >> should instead use 3 as the multiplier and floor it; the result should
> be 0,
> >> 1 or 2 (this will have as much randomness as Math.random provides). Now
> >> substract 1 and you'll get -1, 0 or 1, which is what you want for your
> sort
> >> function.
> >>
> >>
> >> Cheers
> >> Juan Pablo Califano
> >> 2011/1/13 natalia Vikhtinskaya <natavi.m...@gmail.com>
> >>
> >> Hi
> >>> I use function that creates unique array
> >>>
> >>> function uniqueRandomInt(min:Number, max:Number, n:Number) {
> >>> var a:Array = [];
> >>> var i:Number = min;
> >>> while (a.push(i++)<max) {
> >>> ;
> >>> }
> >>> a.sort(function (a:Number, b:Number) { return
> >>> Math.random()*2-1;});
> >>> return a.slice(0, n);
> >>> }
> >>>
> >>> It works fine for AS2. But for AS3 it gives always the same result
> >>> if I ask
> >>> uniqueRandomInt(1, 6, 6); I always get 4,2,3,1,5,6
> >>>
> >>> What is wrong in this code for AS3?
> >>>
> >>> Thank you in andvance.
> >>> _______________________________________________
> >>> Flashcoders mailing list
> >>> Flashcoders@chattyfig.figleaf.com
> >>> http://chattyfig.figleaf.com/mailman/listinfo/flashcoders
> >>>
> >>
> >>
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