> Can I have a facility, please, to make a designated variable post an
> event whenever its value is changed?
> Dyalog had nothing like it
> -- and Donnelly growled that it was impossible without affecting their
> precious performance metrics.
That was back in the days... It has it now. It's called "trigger". It's not
based on events but on callbacks. Its behavior may be baffling when
intersected with APL scope rules (is "x" the same "x" I had in the calling
function if I am localizing "x"?). But it's definitely there.
--
Stefano
{ "I never drink water. I'm afraid it will become habit-forming." ---
W. C. Fields }
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
