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'
--
Raul
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