[Haskell-beginners] Mastermind
Ngoc Dao
ngocdaothanh at gmail.com
Mon Mar 23 22:57:46 UTC 2015
Mike,
You may have noticed Frerich was saying about recursion.
I will provide you some more topics/keywords so that you can
investigate further:
You should practise writing the recursion in 2 ways:
normal recursion and tail recursion (to avoid stackoverflow when the
recursion depth is large)
For the tail recursion, you use the accumulator pattern, which is very
common in functional programming.
On Tue, Mar 24, 2015 at 7:46 AM, Frerich Raabe <raabe at froglogic.com> wrote:
> Hi Mike,
>
> On 2015-03-23 23:06, Mike Houghton wrote:
>>
>> I’m working through http://www.seas.upenn.edu/~cis194/hw/02-lists.pdf [1]
>> - the homework for the CIS 194 Haskell course.
>> I ‘stuck’ on question 6!
>> If anyone has done this I’d really appreciate a pointer to solving it.
>
>
> Just thinking out loud:
>
> Consider that to get all lists of length 2, you could add (e.g. prepend)
> each of the six colors to each of the lists of length 1. And to get each of
> the lists of length 1 you prepend each of the six colors to each of the
> lists of length 0.
>
> Does that help? :-)
>
> --
> Frerich Raabe - raabe at froglogic.com
> www.froglogic.com - Multi-Platform GUI Testing
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