Thanks to anyone.
Unfortunately, my memory failed me, again.
I wanted to use monad } here, many times before I stumbled on this
(v0`v1`v2)} y ↔ (v1 y)} (v2 y)
(from VOC), but completely forgot about it.
Now it's back again.
Thanks again, for your reactions.
R.E. Boss
-----Original Message-----
From: Programming <[email protected]> On Behalf Of Henry
Rich
Sent: vrijdag 10 december 2021 16:51
To: [email protected]
Subject: Re: [Jprogramming] still struggling after 20 years
What you have is
({:} }:)t
t {:} }: t
[This is u}]
t (t {: }: t)} }: t
The linear display of ({:} }:) is wrong.
From your NuVoc ref it appears you want to use monad u}, but you are using the
dyad here.
Henry Rich
On 12/10/2021 10:24 AM, R.E. Boss wrote:
> I'm trying to solve the AdventOfCode puzzles, but at least half of my time I
> spend on troubles with J.
> Mostly I make mistakes, because the rules of J are less intuitive then I
> presumed, but there is also inexplicable behavior, so in the end, J remains a
> black box for me.
>
> t
> 3 1 4 1 2 1 1 8 8 3 6 7 3 3 4 3 6 4 2 1 8 2 7 7
> _6 _8 _5 _8 _7 _8 _8 _1 _1 _6 _3 _2 _6 _6 _5 _6 _3 _5 _7 _8 _1 _7 _2 _2
> 0 0 0 0 0 0 0 1 1 0 1 1 0 0 0 0 1 0 0 0 1 0 1
> 1
>
> ({:} }:)t
> |domain error
> | ({:}}:)t
>
> obviously }} is interpreted as part of a direct definition, red in JQT,
> despite my blank.
>
> (}:}~ {:) t
> |domain error
> | (}:}~{:)t
>
> black box in optima forma.
>
> Fortunately, as NUVOC mentions, } is a replacement of ( {"0 1&.|: ).
> But it cost me too much time, reason to timebox my efforts for AOC.
>
>
> R.E. Boss
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