[Haskell-cafe] Ralf Laemmel's riddle on surviving without the monad transformation library

[Luke Palmer]

I haven't watched the lecture.  But what does he mean "survive"?  Does
it mean to do anything that you can do with mtl?

On Mon, Nov 15, 2010 at 12:53 AM, C K Kashyap <ckkashyap at gmail.com> wrote:
> Hi,
>
> Can someone provide me the solution to the following riddle that Ralf
> asked in his lecture at
> http://channel9.msdn.com/Shows/Going+Deep/C9-Lectures-Dr-Ralf-Lmmel-Advanced-Functional-Programming-Evolution-of-an-Interpreter
>
> Riddle: define a custom made monad (only involving (->) and Either
> String) to survive without the monad transformation library.
>
>
> --
> Regards,
> Kashyap
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