This form allows the fn to have multiple arities. So if I call (recursive- printer) it will 'invoke' ([] (recursive-printer 0)). If I call (recursive- printer 1) then it will 'invoke' ([iteration] ...).
HTH -- Colin Yates colin.ya...@gmail.com On Sun, 4 Sep 2016, at 09:54 PM, Charlie wrote: > I'm going through the Do Things: A Clojure Crash Course, and the > following example (in REPL) is presented: > > (defn recursive-printer ([] (recursive-printer )) ([iteration] > (println iteration) (if (> iteration 3) (println "Goodbye!") (recursive- > printer (inc iteration))))) (recursive-printer) ; => Iteration 0 ; => > Iteration 1 ; => Iteration 2 ; => Iteration 3 ; => Iteration 4 ; => > Goodbye! > > This works as expected, but I don't understand the syntax of the > function definition. Specifically: (defn recursive-printer ([] (recursive- > printer 0)). Isn't the parameter list supposed to be a vector [] > not ([]...)? Also, I don't see how [iteration] is resolved on the > next line. > > Thanx for any help! > > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient > with your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > 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+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com 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+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
