Joseph -
My intention was to first let the more inexperienced members try to
solve the puzzle.
Then maybe use it as an example of first solving and then refining the
solution.
I just don't know if revealing a solution like yours is helpful or
harmful. On the one hand it shows a working solution, but on the other
it may eliminate the challenge and turn students into spectators.
I think there is more than one approach to the problem and I would
like to see some student approaches too.
So in answer to your question, could you wait a week or two to see
what happens?
Richard
-----Original Message----- From: Joseph Lee
Sent: Sunday, May 18, 2014 3:22 AM
To: pythonvis@xxxxxxxxxxxxx
Subject: [pythonvis] Re: exercise discussion
Hi Ivan,
Ah, okay.
Let's try this way:
For retailer problem, examine what would the following code fragments
will
do (without using the Pythone interpreter first):
1. 24.95/10*6
2. 24.95*(0.6)
3. float(24.95*0.6)
Now try running these fragments in the interpreter and write down what
you
hear/see/read. Then write down similarities and differences in the reply
(hint: two of them do the same thing).
For the walking problem, can you tell us the exercise, any hints that the
book provides, how will you solve it and what you wrote (code) in the
reply
so we can provide some comments? In other words, what I'm personally
after
is how you are thinking about the problem, not just cooking up a quick
solution.
Thanks.
Cheers,
Joseph P.S. Richard, would it be okay for us to publish our solution
to your
number divisibility problem here?
-----Original Message-----
From: pythonvis-bounce@xxxxxxxxxxxxx
[mailto:pythonvis-bounce@xxxxxxxxxxxxx]
On Behalf Of Ivan Pivac
Sent: Sunday, May 18, 2014 3:03 AM
To: pythonvis@xxxxxxxxxxxxx
Subject: [pythonvis] exercise discussion
Hi everyone,
Since Thursday's learning room meeting, I have been working my way
through
the two exercises at the end of chapter 2 in the book, Think Like a
Computer
Scientist. I wonder if if would be a a good idea to go through these two
exercises, looking at the code and how best to produce the final output?
In the first task looking at the cost of retailing books, I resolved the
problem, but, I wonder if my code could be more efficiently written.
One question in this exercise is how to write the code where the
retail cost
of the book is $24.95 but the dealer receives a 40% discount. My
solution
was:
24.95/10*6
however, the code didn't seem correct to me although the answer was after
doing the maths on a calculator. .
In exercise two regarding what time a walker returned home, I have the
total
time taken to walk the distance but don't know how to add those
minutes onto
the time of 6.52 am.
Would it be worth while, I wonder, if the experts on the list could
actually
code the exercises as we work through them so that we can discuss the
tasks
on the learning room forum? there may be several ways of producing the
answer so examining those methods would also be an invaluable learning
experience. Meanwhile, I'll continue working on the home arrival time.
Regards
Ivan
--
Ivan Pivac
4271 Great North Rd
P O Box 69-203
Glendene
Auckland 0645
New Zealand
Tel: (64) 9 836-8876
Fax: (64) 9 836-4668
Email: ivan@xxxxxxxxxxxxx
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