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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