mar, 23 Mar 2010, Sprague, Webb (OFM) skribis:
> Hi all,
>
> Forgive my newbieness,... but what does the following snippet mean (from
> some J code that it is now my responsibility to maintain):
>
> if. rtn e.<'NO' do.
>
> I understand "if." And "do.", just not the part in the middle; I assume
> it has something to do with testing for equalituy. "rtn" is the value
> given by a window interface thingy.
>
> On a related note, I would like to print a string with the value of
> return and some text concatenated to it, but the following snippet gives
> me a "domain error"
>
> 'return value:', rtn 1!:2(2)
>
> I think rtn might be boxed, or something, but I can't figure it out. If
> it were a C-ish language, I would be writing "printf("return value: %s",
> rtn);".
>
> Finally, if there is a way to unbox a variable, it would be great to
> hear about it.
Excuse me for my frankness, you seems know nothing about J, but you
are responsible for maintaining some J codes. I strongly suggest you
to spend some time on learning J before browsing your maintained
source codes because knowledge of other programming languages cannot
be extrapolated to J.
for the other question, I guess it should be
('return value:', >rtn) 1!:2(2)
--
regards,
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