Here's how to find conjunctions:
Name Class. Class of (boxed) name:
_2 invalid
_1 unused
0 noun
1 adverb
2 conjunction
3 verb
a=:2 3 5
by=:' '&;@,.@[ ,. ]
over=:({. ; }.)@":@,
4!:0 <'a'
0
4!:0 <'over'
3
4!:0 <'by'
3
f=: @
4!:0 <'f'
2
g=:":
4!:0 <'g'
3
h=:&
4!:0 <'h'
2
Eliminate the conjunctions @ and & to write simple J .
Also, the functions by and over are not simple J verbs.
-----Or
original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Kip Murray
Sent: Monday, November 14, 2011 3:58 PM
To: Programming forum
Subject: Re: [Jprogramming] table challenge in simple J
My definition of Simple J is more restricted and potentially makes the
challenge greater: Simple J uses trains and rank but no other conjunction.
On 11/14/2011 12:59 PM, Dan Bron wrote:
> How about a more difficult challenge? It's related. No embargo period on
this one.
>
> Write a 13 : '' for "Simple J". In particular, write an adverb which,
given an anonymous tacit verb as an argument, derives a functionally
identical verb (in terms of I/O), but all instances of f@:g are replaced
with [: f g . Obviously f and g here are arbitrary (could be named or
anonymous, primitive or compound, vanilla or parenthesized), and there can
be more than one use of @: in the target, and you could have uses within
uses.
>
> It would be quite interesting to me if this were presented as a tree
transformation using L: S: {:: and friends against the atomic representation
of the target. That's not a requirement though - you could always do string
transformations on the linear rep, rearrangements on the boxed rep, etc.
>
> If this was in any way generalized, in sense that I could reuse it for
different but similar transformations, that would be more interesting still.
>
> -Dan
>
> -----Original Message-----
> From: [email protected]
[mailto:[email protected]] On Behalf Of Raul Miller
> Sent: Monday, November 14, 2011 1:25 PM
> To: Programming forum
> Subject: Re: [Jprogramming] table challenge in simple J
>
> You are correct.
>
> Nevertheless, that kind of restriction probably belongs in the subject
line.
>
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