Looks interesting, thanks!

On Thu, Mar 5, 2015 at 4:43 PM, Leon Grapenthin
<grapenthinl...@gmail.com> wrote:
> (defn rect2 [x y width height]
>   (let [lr  [(+ width x) (+ width y)]]
>     (reify Rect
>       (upper-left [_] [x y])
>       (lower-right [_] lr)
>       (area [_] (* width height)))))

Just a quick remark: In JavaScript I purposefully did not use `width`
and `height` for calculating area. That way the garbage collector can
release them, making objects smaller.

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