[pythonvis] Re: Joseph Re: Re: exercise discussion
- From: "Joseph Lee" <joseph.lee22590@xxxxxxxxx>
- To: <pythonvis@xxxxxxxxxxxxx>
- Date: Sun, 18 May 2014 10:40:44 -0700
Hi Richard,
Sure, I'll wait.
//JL
-----Original Message-----
From: pythonvis-bounce@xxxxxxxxxxxxx [mailto:pythonvis-bounce@xxxxxxxxxxxxx]
On Behalf Of Richard Dinger
Sent: Sunday, May 18, 2014 7:07 AM
To: pythonvis@xxxxxxxxxxxxx
Subject: [pythonvis] Joseph Re: Re: exercise discussion
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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