Got it. Thanks! On Friday, June 7, 2013 3:29:55 PM UTC-6, Jonathan Fischer Friberg wrote: > > On Fri, Jun 7, 2013 at 11:13 PM, Matt Smith <matt.s...@gmail.com<javascript:> > > wrote: > >> (-> '([1 2] [3 4] [5]) >> (partial map first) >> flatten >> ) > > > Because this becomes > > (flatten (partial '([1 2] [3 4] [5]) map first)) > > I think I understand how you thought; "(partial map first) becomes a > function, then I call this function with '([1 2] [3 4] [5]) which gives me > what I want!". That is not how it works, -> simple rearranges the forms, > see the documentation: http://clojuredocs.org/clojure_core/clojure.core/-> > > What you want is ->> > http://clojuredocs.org/clojure_core/clojure.core/->> > > Hope that's understandable. > > Jonathan > > > On Fri, Jun 7, 2013 at 11:13 PM, Matt Smith <matt.s...@gmail.com<javascript:> > > wrote: > >> Newbie question here. This code: >> >> (println (flatten(map first '([1 2] [3 4] [5])))) >> >> >> >> >> (def mapfirst (partial map first)) >> (println >> (-> '([1 2] [3 4] [5]) >> mapfirst >> flatten >> )) >> >> >> >> >> (println >> (-> '([1 2] [3 4] [5]) >> (partial map first) >> flatten >> )) >> >> prints out: >> >>> (1 3 5) >>> (1 3 5) >>> () >> >> >> Could someone help me understand why the last println does not print (1 3 >> 5) >> >> thx. >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > >
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