[Haskell-beginners] Help on first program

[John M. Dlugosz]

On 3/28/2014 6:56 PM, Brandon Allbery wrote:
> It uses all of them to get the type, yes. And the more specific pattern must come first;
> the first one always matches in this case because `n` doesn't give it any way not to
> match. If you had warnings enabled, the compiler should have warned you that the second
> form wouldn't be matched (although you may also need optimization turned on).

I was wondering about that.  I'll look for warning flags.  I was loading into GHCi rather 
than running the compiler from the command line.

>
> The compiler doesn't see the different implementations as independent, and in fact doesn't
> see multiple implementations of the function at all at type resolution time; it's
> translated to a single function applying `case` to the parameters to determine which
> clause of the body to evaluate.

Can they be spread out among different source files or be discontiguous within one file?