Exercise:Show how the single comprehension [(x,y) | x <- [1,2,3], y <- [4,5,6]] with two generators can be re-expressed using two comprehensions with single generators.Hint: make use of the library function _concat_.
Another hint: it can be rewritten as concatMap (\x -> concatMap (\y -> [(x,y)]) [4,5,6]) [1,2,3] _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
