Hello,

Recently, I came accross this expression: [ x + y | x <- xs | y <- ys ]

As far as I can see (Haskell Report), this is not allowed by the haskell 98 standard. So I assume it to be an ex- tension. Where can I find information about this? This is a parallel list comprehension, a GHC extension. See http://www.haskell.org/ghc/docs/latest/html/users_guide/syntax-extns.html#PA RALLEL-LIST-COMPREHENSIONS for more info. The code above does the same as zipWith (+) xs ys, basically.

Cheers, Jan ########################################### This message has been scanned by F-Secure Anti-Virus for Microsoft Exchange. For more information, connect to http://www.F-Secure.com/ ###########################################