Introduction David R. MacIver has recently written this blog post about cleaning up a set of tags. This blog post, on the other hand, is about a nice old Unix tool called ‘awk’. Awk is one of those programs that is often overlooked. It is really a small domain-specific language for processing text. In some [...]
Douglas, you’re not alone. import Data.List (sortBy) import Data.Function (on) import Data.Maybe (mapMaybe) import Control.Monad.Instances gizzabuzz pairs combiner = zipWith ($) (cycle funcs) [1..] where sortedPairs = sortBy (compare `on` fst) pairs funcs = map (\n -> display $ mapMaybe (filterOut n) sortedPairs) [1..foldr1 lcm $ map fst $ sortedPairs] display [] = show [...]
Our target for this exercise is “Things that other languages should take from Lisp”. Bignum support In Scheme and Common Lisp, by default you can’t overflow an integer… Prelude> fac n = product [2..n] Prelude> fac 100 933262154439441526816992388562667004907159682643816214685929638952175999932299156089414639761565182862536979208272237582 51185210916864000000000000000000000000 In Common Lisp, you can force your code to use fixed-size numbers (fixnums) for efficiency… Prelude> [...]