El dom, 06-06-2010 a las 15:51 +0000, R J escribió: > What's an elegant definition of a Haskell function that takes two > strings and returns "Nothing" in case the first string isn't a > substring of the first, or "Just i", where i is the index number of > the position within the first string where the second string begins? > import Data.List
f a b = findIndex (a `isPrefixOf`) (tails b) Jürgen _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe