Stuck on #65 Black box testing

[Justin Heyes-Jones]

I finally came up with a solution for #65 and it turns out I'm not allowed to use catch? Why is that? I'm sad because now I'm out of ideas.

(defn id-type [coll]

  (try

    (assoc coll :a 1)

    :map

    (catch Exception e

      (try

        (subvec coll 0)

        :vec

        (catch Exception e

          (try

            (nth coll 0)

            :list

            (catch Exception e

              :set)))))))

[Tom Chappell]

You're probably being stymied by either the jail or because 4clojure runs on an old verison of Clojure (1.2 the last I checked).

I solved this one not by try/catch but by looking for other characteristic differences in the behavior of the item being tested.  Not very specific, I know.

-TC

[ctzsm]

Hi,

The clojure version of 4clojure's sandbox is 1.4.0, try the following code

(= (clojure-version) "1.4.0")

to pass problem 1 to check it.

And there are more than 3 ways to solve problem 65, just keep thinking, any kind of hint may spoil it.

[Justin Heyes-Jones]

Thanks guys I'll keep plugging away

[Justin Heyes-Jones]

Phew, figured it out again without exceptions. 

It's not really a hint but reading this page carefully helped a lot. 

http://clojure.org/data_structures