[racket] HTDP exersise 12.4.2

I would like to add the following: by putting (wrong or correct) solutions
on a public list you do much harm to HtDP. It is essential that readers of
HtDP follow the instructions of the book. Giving someone else the
opportunity to copy/paste a solution of a problem does great harm to the
HtDP and may waste years of efforts put into HtDP. When I got access to the
solutions of HtDP exercises, I was strictly instructed (and rightly so) to
not reveal any substantial material on public forums, just for this reason.
Leaning is hard labour, I know, but you can't really learn by copy/paste.
Rather on the contrary. You can only learn by solving problems by yourself.
Please do not seduce other HtDP readers to quickly pass over an exercise
without doing their own homework. And if you get to a point where you can't
proceed, many people are willing to help you, provded you do so privately or
by asking questions that do not reveal (potential) solutions.
 
Jos
 
 

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From: users-bounces at racket-lang.org [mailto:users-bounces at racket-lang.org]
On Behalf Of Jos Koot
Sent: domingo, 28 de agosto de 2011 22:48
To: 'cloud van der Merwe'
Cc: users at racket-lang.org; 'Matthias Felleisen'
Subject: Re: [racket] HTDP exersise 12.4.2


I second Matthias. If in furture you have such questions, mail them
privately to someone you know who may have an answer. And if you don't have
someone like that send it privately to me if you like. I like teaching very
much and have much experience in teaching programming and also some
experience with helping HtDP students. I have access to the answers of HtDP
problems, so I can check that my answers are in line with the intentions of
the author. I am retired, but I cannot refrain from doing some teaching.
Teaching is not a job. It is a way of life.
Jos

  _____  

From: users-bounces at racket-lang.org [mailto:users-bounces at racket-lang.org]
On Behalf Of Matthias Felleisen
Sent: domingo, 28 de agosto de 2011 22:25
To: cloud van der Merwe
Cc: users at racket-lang.org
Subject: Re: [racket] HTDP exersise 12.4.2



On Aug 28, 2011, at 3:54 PM, cloud van der Merwe wrote:


Thanks guys, any criticism will be appreciated!


Please don't post complete solutions on-line. 
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