[Haskell-cafe] Re: Haskell and the Software design process

[Maciej Piechotka]

On Sun, 2010-05-02 at 21:35 -0700, Alexander Dunlap wrote:
> f ys = let xs = (1:ys) in last xs
> 
> uses the partial function "last". Rewriting it in the "non-partial
> style" gives
> 
> f ys = case (1:ys) of
>   [] -> Nothing
>   xs -> Just (last xs)
> 
> 

I guess it is more like

f :: Num a => [a] -> a
f = fromMaybe 1 . safeLast

Regards

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