Since the REPL tries to print out the lazy sequence it ends up forcing
evaluation as well.
If you do something like (def foo (some-lazy-seq)) in the repl it
won't get forcibly realized as before.
This is a very common source of misconception, you're not alone :)
Regards,
BG
On Tue, Jul 31, 2012
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 mapp
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
Evaluating this form:
_
(dispatch/react-to #{:dom-loaded}
(fn [t d] (do
(load-todos!) ;; init !todos OK
(log-console (str "todos=" @!todos)) ;; OK
