Fantastic, thank you!
On Friday, April 12, 2013 11:13:23 PM UTC+1, John Hume wrote:
>
> 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]<javascript:>>
> 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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