mapv do the eval.
Should be a reflex: when something works in the repl, but not in the
code...it's lazy !
Thanks
Le mardi 31 juillet 2012 14:07:17 UTC+2, Baishampayan Ghose a écrit :
>
> Hi,
>
> map in Clojure (and ClojureScript) is lazy. Since you are not using
> the return value of the mapping, it's not doing much at all.
>
> You can force realization of a lazy sequence by putting a (doall...
> around the map call.
>
> You can also use mapv (in Clojure 1.4 at least) which will return a
> vector instead of a lazy sequence.
>
> Regards,
> BG
>
> On Tue, Jul 31, 2012 at 5:31 PM, Pierre-Henry Perret <phper...@gmail.com>
> wrote:
> > Evaluating this form:
> > _________________________________
> > (dispatch/react-to #{:dom-loaded}
> > (fn [t d] (do
> > (load-todos!) ;; init !todos OK
> > (log-console (str "todos=" @!todos)) ;;
> OK
> > (map #(add-field! (:title %))
> @!todos))))
> > ;; not evaluated
> > ___________________________________
> >
> > the last expr is not evaluated : the side effect is on another atom
> > variable. When this last expr evaluated outside in the repl, it does the
> job
> >
> > Why is that last expr not evaluated in the reactor ?
> >
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>
>
> --
> Baishampayan Ghose
> b.ghose at gmail.com
>
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