On 22 May 2013 18:34, atkaaz <atk...@gmail.com> wrote:
> I think the exception is thrown because you basically called (every? false
> coll) however on my clojure version I cannot reproduce it oh wait there we
> go, some bug here with empty collection (maybe someone can pick it up):
> => (every? false [1 2 3])
> ClassCastException java.lang.Boolean cannot be cast to clojure.lang.IFn
> clojure.core/every? (core.clj:2423)
> => (every? false [])
> true
>
> => *clojure-version*
> {:interim true, :major 1, :minor 6, :incremental 0, :qualifier "master"}
(every? false []) should return true if and only if (false x) is
truthy for every x in [], which is certainly the case.
Cheers,
Michał
>
>
>
>
>
> On Wed, May 22, 2013 at 7:17 PM, Peter Mancini <peter.manc...@gmail.com>
> wrote:
>>
>> So I did some coding and came up with this but it is broken;
>>
>> (= java.lang.Boolean (type false)) ;;evaluates to true
>>
>> (defn all-true?
>> [coll]
>> (every? (cond (= java.lang.Boolean (type identity)) identity :else
>> false) coll)) ;;compiles
>>
>> (all-true? '(true true true)) ;; throws java.lang.ClassCastException:
>> java.lang.Boolean cannot be cast to clojure.lang.IFn
>> (all-true? '(true true false))
>> (all-true? '(true true 3))
>>
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