Gracjan Polak wrote: John Meacham wrote:

...

Oleg wrote a great article on implementing the perfect shuffle. with some sample code.

http://okmij.org/ftp/Haskell/misc.html#perfect-shuffle

Thats the kind of answer I was hoping to get :) Thanks.

shuffle could be useful in standard library. At least Python has it. I was translating some small Python program, the hardest part was the missing shuffle function. What do you think?

Also, note that, in a lazy language, the algorithm's complexity will be dependent on the number of cards drawn from the deck, are possibly sub-linear in the number of cards in the deck. John