Gosi wrote:

>     6!:0 "0 ''
>
>     NB. blank display

Just to be clear, this behavior is unrelated to  6!:0  specifically.

It is exhibited by all  f"0 y  where  0 e. $ y  (whether the  "0  is, to borrow 
a phrase, express or implied).  Basically you're asking to operate on all the 
scalars of an array which contains no scalars.  

Now, there are some cavaeats; notably regarding verbs with side effects.  
Further, the display, while empty, can can be arbitrarily tall and wide, 
depending on the rank of    (f"0) 0  .

-Dan

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