Good morning, Take a look at the following - it comes from Graham Hutton's book: "Programming in Haskell" - see link: http://horna.org.ua/books/fp-papers/Hutton,%20Graham%20-%20Programming%20in%... qsort :: (Ord a) => [a] -> [a] qsort [] = [] qsort (x:xs) = qsort smaller ++ [x] ++ qsort larger where smaller = [a|a<-xs, a <= x] larger = [a|a<-xs, a > x] ----- Original Message ----- From: Michael Anckaert To: beginners@haskell.org Sent: Thursday, March 10, 2011 2:46 AM Subject: [Haskell-beginners] Beginners issue with 'Why Haskell matters' example code Hey everyone I'm new on the list here and just started out learning Haskell and functional programming. I have over 12 years experience programming in various languages, from C to Python. I started out with the Why Haskell matters paper (http://haskell.org/haskellwiki/Why_Haskell_Matters) and ran into a problem with the code below. It's discussed in the paper but when I save it to test.hs and load it into ghci, I get the following output: ------------------------ [1 of 1] Compiling Main ( test.hs, interpreted ) test.hs:6:22: parse error on input `=' Failed, modules loaded: none. ------------------------ Could someone give a pointer on where my error lies? qsort [] = [] qsort (x:xs) = qsort less ++ [x] ++ qsort more where less = filter (=x) xs -- Kind regards Michael Anckaert http://www.sinax.be ------------------------------------------------------------------------------ _______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners