Well I thought I had a prettier version. 

   numeric1=:(0 -: {:)@:(0 # ,)
   numeric1 'a'
0
   numeric1 4 5 $ 'a'
0
   numeric1 i. 4 5 
1
   numeric1 x: i. 4 5 
1

But then Raul's example of sparse arrays failed

   numeric1 4+0 $.i.3 
0

The first part seemed to work as expected
   (0#,) 4+0 $.i.3
   $(0#,) 4+0 $.i.3
0

So I assigned it to a variable which looked empty as expected...
   t=.(0#,) 4+0 $.i.3
   t
   $t
0

but then this!

   {:t
4

Anyone know how an empty list can have a last item?

Confused, bob

> On Nov 9, 2017, at 10:15 AM, Raul Miller <[email protected]> wrote:
> 
>  isnumeric 4+0 $.i.3

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