I was just making the point that the verb must return an array of
results. < does not and that fails before the type of the result enters
into the matter. 0: would give the same error.
Henry Rich
On 7/13/2023 6:10 PM, Raul Miller wrote:
+: is double, < is box (which in this example would throw a type error).
Other than that, ... using @. seems to be the way to go.
Thanks,
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm