Yeah, I could do similar open testing:

    (def is-type (proc (x t) (eq? (type x) t)))

    (is-type 5 'int)

But it's nice to have single-parameter ones for FP list stuff. I suppose that 2-parameter version could have their order swapped and do partial application on top of it.

Anyway, was just sharing something I had fun making. No language wars intended.