Anyone here used http://hackerrank.com before?

\o

@yogidevbear: why?

I'm looking at their 30 day coding challenge stuff and wanted to submit all my solutions using Clojure

I'm looking at the first challenge which is a "Hello World" example

There is supposed to be a value passed in from the system (outside of my code) that I need to print out, but I can't figure out how to actually get that value that's supposedly being passed in

do you have the link?

https://www.hackerrank.com/challenges/30-hello-world

in some cases they call your function and it is given as a param

and in other cases it is from STDIN

let me check

Says

; Enter your code here. Read input from STDIN. Print output to STDOUT
;

for this case you can use read-line

How would I do that? Sorry, new to this

no problem

this is the function that I’m mentioning https://github.com/clojure/clojure/blob/010864f8ed828f8d261807b7345f1a539c5b20df/src/clj/clojure/core.clj#L3668

so you could for example do something like

(let [my-var (read-line)]

and do whatever you need to do with my my-var

Thanks

or for this example

let me give that a try

ok

😉

Perfect

Thanks Seb :thumbsup:

you are welcome

(let [inputString (read-line)]
  (println "Hello, World.")
  (print inputString))

🙂

for this case in which you don’t need to hold the var (state), you could do something like

(println "Hello, World.")
(print (read-line))

Seems obvious when you point it out 😉

I’ve to go out for a couple of hours, but feel free to ping me or DM if you hit any blockers, would be happy to help , I’ll try to answer later, when I’m back

Not sure if this was the best solution, but it worked for one of the FP challenges. Really enjoying the experience.

(fn[num lst]
  (dotimes [i (count lst)]
    (dotimes [j num]
      (println (nth lst i)))))

Where num was an iteration count and lst was... a list of integers to print num times

@yogidevbear: you could also generate the needed list and then print it all out

(defn foo [num lst] (doseq [x (flatten (map #(take num (repeat %)) lst))] (println x)))