[Haskell-cafe] Linear shuffle

[Tomasz Zielonka]

On Fri, Jan 14, 2005 at 09:17:41AM +0100, Gracjan Polak wrote:
> This algorithm seems not effective, length, take, drop and (!!) are 
> costly. Is there any better way to implement shuffle?

You can use mutable arrays (modules Data.Array.MArray, Data.Array.IO). 

Best regards,
Tomasz