In PHP there is a handy feature called shuffle() that allows you to mix an array (see Very short trick: take random elements from an array in PHP ). An excellent version of the javascript I found here . Slightly revised the code below:
1 2 3 | = function ( ) { Array. Prototype. Shuffle = function () { var j , x , i = this . length ; i ; j = Math. floor ( Math. random ( ) * i ) , x = this [ -- i ] , this [ i ] = this [ j ] , this [ j ] = x ) ; for (var j, x, i = this. length, i, j = Math. floor (Math.E random () * i), x = this [- i], this [i] = this [j], this [j] = x); } |
al posto di parseInt() , in quanto da test effettuati è risultato estremamente più veloce, almeno sulla mia macchina e con FireFox 3. Compared to the original I have extended the object Array and placed Math.floor() instead of parseInt() , because from our tests was very fast, at least on my machine and with FireFox 3.
In ActionScript 3.0, I used the classroom MatrixArray :
1 2 3 4 5 6 7 8 | / ** * Mix in a random matrix * * / shuffle ( ) : void { public function shuffle (): void { / / Thanks to http://jsfromhell.com/array/shuffle var j , x , i = __len ; i ; j = Math . floor ( Math . random ( ) * __len ) , x = this [ -- i ] , this [ i ] = this [ j ] , this [ j ] = x ) ; for (var j, x, i = __len, i, j = Math . floor ( Math . random () * __len), x = this [- i], this [i] = this [j], this [j ] = x); } |
[...] Already talked about how to implement the method shuffle () in Javascript and Actionscript. I realized, tuttaavia, not pointing out that Actionscript is able to [...]
This is my own solution: http://www.daveoncode.com/2009/01/08/implementing-arrayshuffle-in-actionscript/
It's only 3 lines of code and it works fine
@ DaveOnCode: very short snippets
thx
[...] As seen in the Very short snippet: shuffle () in Javascript and Actionscript. [...]