Here is how I would now do it, borrowing sh and the idea of using |.
from you, Linda.
sh =: ] {~ # ? #
gwk =: ([: |. [: - [: i. #) |."0 1 [: ([ , ' ' , ])/"1 [: sh\ sh
gwk 'abcde'
b
d b
e d b
e a b d
b e d c a
Kip
On 2/27/2012 4:35 AM, Linda Alvord wrote:
> Here is my latest version which has simple tacit definitions. I was
> impressed with all the different strategies that were submitted and it
> should provide you with many options to consider and hopefully allow you to
> understand J better. I know I learned a lot and I still have many more
> versions to study.
>
> f=: 13 :'((#y)?#y){y'
> f
> ] {~ # ? #
> f 'abcde'
> deacb
>
> g=: 13 :'|. f \. f y'
> g
> [: |. [: f\. f
> g 'abcde'
> c
> ac
> dca
> eadc
> eacdb
>
> h=: 13 :'|.,"2 |:'' '',:|:|. g y'
> h
> [: |. [: ,"2 [: |: ' ' ,: [: |: [: |. g
> h 'abcde'
> a
> e a
> e a d
> d b a e
> a c e d b
>
> gw=: 13 :'(,.(1+#y)+i.#y)|."1 h y'
> gw
> ([: ,. (1 + #) + [: i. #) |."1 h
> gw 'cherrytrees'
> e
> c e
> c e r
> e c h r
> r y h c e
> y h t r c e
> r t r c e y h
> y c r h t s e r
> r h e y t r c e s
> c r t e h s r r y e
> t s e e y r r h e r c
>
> All the tacit expressions are quite simple looking. If I misses some of your
> good ideas please let me know. Maybe I can get rid of some of the
> parentheses in the final verb. I anticipate having some questions about some
> of the strategies you've used when I look at them more carefully.
>
> Linda
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Linda Alvord
> Sent: Sunday, February 26, 2012 3:33 PM
> To: 'Programming forum'
> Subject: Re: [Jprogramming] Challenge 6 Many Many Cherry Trees
>
> I noticed that all the first group begin with c but I didn't notice that
> all the last group end with d
>
> I don't often find my own problems.
>
> Linda
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Linda Alvord
> Sent: Sunday, February 26, 2012 6:10 AM
> To: 'Programming forum'
> Subject: Re: [Jprogramming] Challenge 6 Many Many Cherry Trees
>
> Here's more I don't understand.
>
> p=: 13 :'((#y)?#y){y'
> p\p 'abcde'
> e
> eb
> bea
> bdea
> baedc
>
> Why is this a domain error?
>
> (((#y)?#y){y)\((#y)?#y){y=:'abcde'
> |domain error
> | (((#y)?#y){y)\((#y)?#y){y=:'abcde'
>
> Why is each row not scrambled in the first example but they are in the
> second?
>
> ]\ 'cbaed'
> c
> cb
> cba
> cbae
> cbaed
>
> ]\. 'cbaed'
> cbaed
> baed
> aed
> ed
> d
>
>
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Raul Miller
> Sent: Friday, February 24, 2012 11:57 AM
> To: Programming forum
> Subject: Re: [Jprogramming] Challenge 6 Many Many Cherry Trees
>
> On Fri, Feb 24, 2012 at 11:39 AM, Kip Murray<[email protected]> wrote:
>> Raul has explained "0 _ . In effect I was re-inventing<\. (box suffix) .
>
> Or, more specifically:
> ]\. 'cbaed'
>
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