[Haskell-cafe] loop problem

[Stuart A. Kurtz]

Dear Alexander,

> While we're having fun golfing, my attempt:
> 
> mapM_ (\(x, y) -> printf "%d %d\n" x y) $ [(n, n^2) | n <- [1..100]]

Nice, although I'm a bit perplexed as to why it typechecks without hints, whereas the following (which avoids the boxing/unboxing of pairs) does not:

    mapM_ (\n -> printf "%d %d" n (n^2)) [1..100]

Peace,

Stu