Apparently a list can be destructured as a map, but a vector cannot.
The "& args" syntax returns the result as a list, not a vector.
- James
On 27 August 2014 19:20, John Gabriele <jmg3...@gmail.com> wrote:
> Why is it that although this works:
>
> ~~~clojure
> (defn foo [& args] (let [{:keys [a b]} args] (str a \~ b)))
> ;;=> #'some-app.core/foo
> (foo :a 1 :b 2)
> ;;=> "1~2"
> ~~~
>
> this does not:
>
> ~~~clojure
> (let [{:keys [a b]} [:a 1 :b 2 :c 3]] (str a \~ b))
> ;;=> "~"
> ~~~
>
> ?
>
> And even stranger, *this* *does* work:
>
> ~~~clojure
> ;; Changed vector to a list.
> (let [{:keys [a b]} '(:a 1 :b 2 :c 3)] (str a \~ b))
> ;;=> "1~2"
> ~~~
>
> ?
>
> Incidentally, I see that the following `let` also does indeed work:
>
> ~~~clojure
> (let [ [& {:keys [a b]}] [:a 1 :b 2 :c 3] ] (str a \~ b))
> ;;=> "1~2"
> ~~~
>
> Thanks!
>
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