Yes it does. NaN is an 'instance' of the Number type (even though it is
'Not a Number' ;)  )


On Wed, Aug 2, 2017 at 10:18 AM, Harbs <harbs.li...@gmail.com> wrote:

> Interesting.
>
> I’m not sure that I realized that NaN passes that test. Does it?
>
> > On Aug 2, 2017, at 1:12 AM, Greg Dove <greg.d...@gmail.com> wrote:
> >
> > I agree undefined works the same as NaN for many things for example, but
> it
> > fails on very basic things like if (x is Number)
>
>

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