You can use a map destructuring form on a vector like so:
(let [{x 0 y 1 :or {x 0 y 0}} [7]] [x y])
returns [7 0]
On Fri, Apr 12, 2013 at 5:00 PM, henry clifford <[email protected]> wrote:
> I'm trying to use the :or destructuring syntax as seen here applied to a map
>
> (def point {:y 7})
> (let [{:keys [x y] :or {x 0 y 0}} point]
> (println "x:" x "y:" y))
> x: 0 y: 7
>
> but I can't get this to work with vectors:
>
> (def point [7])
> (let [[x y :or [0 0]] point]
> (println "x:" x "y:" y))
>
> what' I'm expecting is x:7 y:0
>
> but I'm getting Exception Unsupported binding form: :or
>
> Any thoughts on this?
> Thanks!
>
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