Re: [Haskell-cafe] Specify array or list size?

Glynn Clements wrote:

For lists, no. For arrays, in the general case, again no. For your specific case, you can use an array whose indices have type Word8 (8 bit unsigned integer), i.e.

import Data.Word import Data.Array

type ByteMap = Array Word8 Word8

For an RC4 implementation, you should probably be using Word8 throughout rather than Int or Integer.

Thanks for the pointer! Okay, I'll start learning how Arrays and 8-bit words work. That'll keep me busy for a few days. :-) Cheers, Daniel.