Oh, I didn't even know we could loop using dotimes. Thanks for the explanation and for the code as well.
On Thursday, April 14, 2016 at 6:58:57 PM UTC-7, Bobby Eickhoff wrote: > > The result of the last expression evaluated is always returned. Hence, > the shape of the function is what determines the points of return and the > returned values. For example, if you're entire function is defined as one > (if ...) statement, there are two possible points of return, each of the > branches. > > But I think you're probably asking if you can return early from a > function, like in Java or Javascript. No, there's no return "statement" in > Clojure. You just have to structure your functions a certain way. > > Here's an alternate version of your pyramid function which uses (recur > ...). This is equivalent to calling pyramid recursively, but the compiler > is able to optimize this recursive call away. In other words, it will > never overflow the stack. > > (defn pyramid [n] > (when (pos? n) > (dotimes [_ n] > (print "* ")) > (println) > (recur (dec n)))) > > > > > On Thursday, April 14, 2016 at 9:23:58 PM UTC-4, Varun Kamra wrote: >> >> On Thursday, April 14, 2016 at 5:58:33 PM UTC-7, Varun Kamra wrote: >> > Hey guys I am new to clojure. I was just experimenting by printing a >> pyramid of stars 5 rows and 5 column. Here's the code: >> > >> > (defn pyramid [j i] >> > (if (and (= i 0) (neg? >> > (println "There's your pyramid")) >> > (if (= j 0) >> > (do (println) >> > (pyramid (- i 1) (- i 1))) >> > (do (print "* ") >> > (pyramid (- j 1) i)))) >> > >> > It's working fine till it prints the pyramid, but after printing it, it >> continues printing a lot of stars and eventually fail with stack overflow. >> I am guessing that a if I put a negative check I can prevent it but I >> wanted to know if there's a way to return from the recursive call instead. >> >> I understood now, it was going in the else condition of the if so here'so >> the modified code >> >> (defn pyramid [j i] >> (if (= i 0) >> (println "There's your pyramid")) >> (if (= j 0) >> (do (println) >> (pyramid (- i 1) (- i 1)))) >> (if (not (neg? j)) >> (do (print "* ") >> (pyramid (- j 1) i)))) >> >> But my question still stands if ther's a way to return from function. >> >> -- 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.
