< j k [j=.0 [ k=.1
|syntax error
| <j k[j=.0[k=.1
< 0 1
┌───┐
│0 1│
└───┘
< j, k [j=.0 [ k=.1
┌───┐
│0 1│
└───┘
Hallo PackRat, je schreef op 28-07-11 18:16:
> I'm trying to learn better about using "from" and "amend" (that is,
> trial and error with applications somewhat beyond the beginning level
> where I've been for a while).
>
> To do some testing with the "from" verb applied to tables rather than
> lists, I was experimenting with the following explicit verb:
>
> ---------------------------------------------------
>
> NB. testamend.ijs
>
> require 'files strings'
>
> ta=: 3 : 0
>
> qq=. '0';'1';'2';'3';'4';'5';'6';'7'
> qq2=. 2 4 $ qq
> pp=. 'aebfcgdh'
>
> p=. ''
> for_j. i.2 do.
> for_k. i.4 do.
> p=. p , ((".>((< j k) { qq2)) { pp)
> end.
> end.
> )
>
> ---------------------------------------------------
>
> Unfortunately, loading the script in J602 and executing the "ta" verb
> results in this:
>
> ta''
> |syntax error: ta
> | p=.p,((".>((<j k){qq2)){pp)
>
> However, when I manually execute the critical part of the error line in
> the interpreter:
>
> (".>((< j k) { qq2)) { pp
>
> using any values of 0 or 1 in place of j and 0 to 3 in place of k, the
> code works perfectly.
>
> Why is this code sequence a syntax error in the script while it works
> OK directly in the interpreter?
>
> Thanks in advance for your assistance in helping me understand this!
>
>
> Harvey
>
> ----------------------------------------------------------------------
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--
Met vriendelijke groet,
=@@i
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