I would be inclined to do something similar:
numeric=: 0 = 0 {.@{. ,
That said, it's usually sufficient to rely on domain errors for this
kind of thing.
Thanks,
--
Raul
On Thu, Nov 9, 2017 at 12:20 PM, Michael Berry <[email protected]> wrote:
> Hello J world,
>
> I have a verb that returns scalar 1 if the argument is numeric of any shape
> and scalar 0 otherwise.
> It works fine:
>
> numeric i. 5
>
> 1
>
> numeric 9
>
> 1
>
> numeric i. 2 3 4
>
> 1
>
> numeric 'cat'
>
> 0
>
> numeric 3#<i. 4
>
> 0
>
>
> My definition feels clumsy, however. Can anyone suggest something nicer?
>
>
> numeric=: monad : '0 -: 0{ , 1{. 0#y'
>
>
> -Michael
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