[Jprogramming] i.0 0[A[B

[Peter B. Kessler]

http://www.jsoftware.com/help/jforc/declarations.htm mentions

      The display of a rank-2 array with no items is different: here we have zero lists, so we should expect no lines at all.  This is indeed what happens:

        0 0$0

     (there is no blank line).  This is the result you should produce if you want a function to display nothing.

I think of "0 0 $ y" as "cast to void" rather than a no-op: the argument gets evaluated, but not used.

			... peter

On 04/18/13 09:40, Greg Borota wrote:
> When you load jconsole with no profile, .0 0[A[B is the sentence executed
> upon start-up. where A are stands for setting ARGV_z_ and B for setting
> BINPATH_z_.
>
> I am guessing the resulting i. 0 0 is just a way of simulating what in
> other languages would be known as NoOp. If that's the case indeed, what are
> there other constructs to get the same end result?
> ----------------------------------------------------------------------
> For information about J forums see http://www.jsoftware.com/forums.htm
>