I reckon that's a deceptive error message and not }} treatment:
;: '({: } }:)'
+-+--+-+--+-+
|(|{:|}|}:|)|
+-+--+-+--+-+
You seem to be trying to provide an x and a y to } (Amend), but where's the m?
https://code.jsoftware.com/wiki/Vocabulary/curlyrt#dyadic
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, December 10th, 2021 at 9:24 AM, R.E. Boss <[email protected]>
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
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
