Thanks Matthias for yet again looking at my attempt at this exercise!
Agreed Stephen, yes the purpose statement is not as clear as it could be.
Great list, great book, great software.
Regards,
Sean Kemplay
On Thu, Jul 12, 2012 at 10:21 PM, Matthias Felleisen
wrote:
>
> On Jul 12, 2012, at 5:1
On Jul 12, 2012, at 5:14 PM, Stephen Bloch wrote:
> The only quibble I would raise is with the purpose statement for "make-words":
>> ;; make-words symbol list of words -> list of words
>> ;; Given a symbol and a list of (partial) words, start
>> ;; back filling with the symbol producing a new li
On Jul 12, 2012, at 4:40 PM, Sean Kemplay wrote:
> Ok, here is another shot - this time, like arrangements, making a list
> of words from the base case of insert-everywhere/in-all-words to feed
> to make words.
Lovely. Contracts and test cases for each function, each function does a
clearly-sp
Looking simple, elegant and correct. Onward -- Matthias
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Ok, here is another shot - this time, like arrangements, making a list
of words from the base case of insert-everywhere/in-all-words to feed
to make words.
;; Word -> [Listof Word]
(check-expect (arrangements '(a)) (list '(a)))
(check-expect (arrangements '(a b)) (list '(a b) '(b a)))
(define (a
Thanks Matthias,
I will go through 2e up until the arrangements exercise then make the
examples to post to the list.
Thank you for your time it is much appreciated.
Sean
On Fri, Jul 6, 2012 at 1:21 PM, Matthias Felleisen wrote:
>
> On Jul 6, 2012, at 5:48 AM, Sean Kemplay wrote:
>
> I am going
On Jul 6, 2012, at 5:48 AM, Sean Kemplay wrote:
> I am going through htdp first edition (at chapter 17 which refers to
> arrangements from chapter 12 which is why I revisited the exercise). Would
> you suggest continuing with this edition or moving to the draft second edition
>
I would switch
Hi Matthias,
Thanks for the feedback. Just a couple of questions before I give it
another go if that's okay. I know there is something I need to learn from
this exercise.
I am going through htdp first edition (at chapter 17 which refers to
arrangements from chapter 12 which is why I revisited the
Sean,
1. I have re-arranged your program so that it becomes readable:
-- the function that explains it all comes first
-- if you need a helper function, it is placed below
-- don't place functions at top that are called by functions further down
(roughly)
-- make sure lines are at mo
On Mon, Jul 2, 2012 at 1:51 AM, Dave Yrueta wrote:
> I should have been more explicit: "ensuring the function design conforms to
> its contract" means testing it in the manner demonstrated by Matthias.
> "Check-expect" is your friend :).
> On Jul 1, 2012, at 4:12 PM, Matthias Felleisen wrote:
>
Thank you all for your time and advice. I will start from scratch with this
in mind and let you know how I get on.
Sean
On Jul 2, 2012 1:51 AM, "Dave Yrueta" wrote:
>
> I should have been more explicit: "ensuring the function design conforms
to its contract" means testing it in the manner demon
I should have been more explicit: "ensuring the function design conforms to
its contract" means testing it in the manner demonstrated by Matthias.
"Check-expect" is your friend :).
On Jul 1, 2012, at 4:12 PM, Matthias Felleisen wrote:
>
> On Jul 1, 2012, at 4:17 PM, Sean Kemplay wrote:
>
>>
On Jul 1, 2012, at 4:17 PM, Sean Kemplay wrote:
> Looking back, I am wondering if my solution is a bit of a cheat -
> specifically :
>
> (define (insert-everwhere/in-one-word s word)
> (make-words s word word))
It's not a cheat, it's wrong. I did you a favor and worked out a failing test
ca
Hi Sean --
Don't know if it is a "cheat," but I can tell you from experience your solution
diverges from the preferred one at the "insert-everywhere/in-one-word"
function.
Try working through this exercise by systematically applying the design recipe.
That is, take the time to make your data
Hello,
I am working through HTDP and have re-visited the arrangements
exercise from chapter 12.
Looking back, I am wondering if my solution is a bit of a cheat - specifically :
(define (insert-everwhere/in-one-word s word)
(make-words s word word))
Here is the entire solution - is there a bet
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