thanks!
sun
On Feb 14, 4:34 pm, Brian Doyle <brianpdo...@gmail.com> wrote:
> 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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