[Haskell-cafe] A functional programming solution for Mr and Mrs Hollingberry

Andreas Pauley apauley at gmail.com
Mon May 21 07:38:08 CEST 2012

On Mon, May 21, 2012 at 12:54 AM, Artyom Kazak <artyom.kazak at gmail.com> wrote:
> Andreas Pauley <apauley at gmail.com> писал(а) в своём письме Sun, 20 May 2012
> 20:33:13 +0300:
>> I want to see how elegant a solution I can get in a functional
>> language, given that the problem description is not really elegant at
>> all. It has a few annoying exceptions to the normal rules, typical of
>> what one might get in a real specification from some client.
> After taking a look at other solutions, I feel like I will have to explain
> myself, so I’d better do that without prompting :)
>  - nothing was said about meaningful error messages, so I didn’t bother.
>  - I had decided against defining constants like
> `supplier_markup_percentage_modification`
>    separately; `PremiumSupplierIDs` and markup table are defined locally in
> the `calc`
>    function, too. The latter two issues are fixed in the next version, as
> someone
>    may consider them to be against elegance.
>  - surprisingly, all solutions use explicit comparisons to determine the
> product
>    category. While it is okay for continuous ranges of codes, it doesn’t
> scale and
>    not really elegant. Fixed as well.

Thanks, I've merged this. Had a quick look at the code, I like it :-)


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