[Haskell-cafe] getting last char of String

[Jesse Schalken]

On Sat, Jan 1, 2011 at 8:39 PM, Henning Thielemann <
lemming at henning-thielemann.de> wrote:

>
> On Sat, 1 Jan 2011, Jesse Schalken wrote:
>
>  On Sat, Jan 1, 2011 at 8:54 AM, Felipe Almeida Lessa <
>> felipe.lessa at gmail.com> wrote:
>>
>> > No definition for last works with infinite lists =).
>>
>>
>> Unless you make the result nullable, of course.
>>
>> maybeLast :: [a] -> Maybe a
>>
>>
>> maybeLast [] = Nothing
>>
>> maybeLast [x] = Just x
>> maybeLast (_:xs) = maybeLast xs
>>
>
> How would this work for infinite lists?
>
>
If your list is infinitely big, then reaching its end will take infinitely
long. ;)

It will loop forever, just like `last [1...]` does.
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