I'm adding a search function to my www forum implemented in Haskell.

Is there a Prelude/Library function that will efficiently find a pattern in a String? Nothing in modules PreludeList or List seem to fit the bill.

If you're using GHC, then there's a pretty good interface to the GNU regex library in module RegexString (see http://www.haskell.org/ghc/docs/latest/set/regexstring.html). Cheers, SImon