[Haskell-cafe] Debugging methods for haskell

[Henning Thielemann]

On Thu, 16 Jul 2009, Fernan Bolando wrote:

> Hi all
>
> I recently used 2 hours of work looking for a bug that was causing
>
> Program error: Prelude.!!: index too large

A good way to avoid such problems is to avoid partial functions at all. 
(!!) is also inefficient. Is it possible to define the function in terms 
of foldl?