[plt-scheme] Re: HtDP 12.4.2 question details

thank you,
mike

On Apr 7, 4:38 am, Matthias Felleisen <matth... at ccs.neu.edu> wrote:
> 12.4 is not pivotal. You can move one and return whenever you feel  
> like tackling it again.
>
> However, 12.4 is a good test of whether
>
>   (1) you have understood and absorbed the design recipe
>   (2) you have understood and absorbed the idea of "making a wish"  
> when you're stuck
>   (3) you have the persistence to apply the design recipe over a  
> series of four five six auxiliary functions.
>
> It is particularly heavy on (3). (Once you understand that (1) and  
> (2) give you (3), you will also see that the exercise takes 10-20  
> minutes at most.)
>
> -- Matthias
>
> On Apr 7, 2009, at 12:10 AM, mike wrote:
>
>
>
> > For the professors out there; I cruised through sec12 until i got
> > to problem 12.4.2(spent hours and i just don't get it!!).I just want
> > to move on but my question is : Is 12.4.2 a pivotal problem in gauging
> > one's understanding of the design recipe??? Does failure to solve the
> > problem indicate a serious flaw in understanding that will impede
> > under-
> > standing of subsequent sections of the book?
> > mike
>
> > On Apr 4, 10:03 pm, Grant Rettke <gret... at acm.org> wrote:
> >> Thanks guys. I won't be abusing the function contract by keeping that
> >> integer in there. I am back to work.
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