Hi Andrew, > let x = expensiveComputation foo in x + x > > I would certainly hope that expensiveComputation wasn't called twice, > and even though the language doesn't guarantee it, I have already > written code that assumed it.
I always thought that there is a tiny difference between "let" and "where": Using "let" "expensiveComputation foo" might be computed twice (depending on the compiler?). But using: x + x where x = expensiveComputation foo should compute the value for x only once. Therefore, I always try to use "where" for common subexpressions. Please correct me if I'm wrong here. Cheers, Jan _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell
