On Sat, Feb 14, 2009 at 2:24 PM, wubbie <sunj...@gmail.com> wrote:
>
> Hi,
>
> a quick question:
>
> user=> (keys {:a 1 :b 2})
> (:a :b)
>
> But
> user=> (key {:a 1})
> java.lang.ClassCastException: clojure.lang.PersistentArrayMap cannot
> be cast to java.util.Map$Entry (NO_SOURCE_FILE:0)
>
> I see defn key in core.clj, though.
> What can be the correct usage of fn key, then?
>
Here is the correct usage of fn key:
1:1 user=> (key (first {:a 1}))
:a
Key only accepts a map entry and not a Map object.
> thanks in advance,
> -sun
>
> >
>
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