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  1. Practice
  2. Functional Programming
  3. Introduction
  4. Array Of N Elements
  5. Discussions

Array Of N Elements

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  • avi_mathur + 3 comments

    In Scala the line 

    println ( list + "\n" )

    must be removed.

    • xavier_guihot + 0 comments

      yes, since the result is then outputed twice, making the tests fail

    • civilizeddev + 0 comments

      Yes, but you can change the return type of the function f to String instead.

    • dzmitry75 + 0 comments

      lol I tried to fix that by inserting

      println(s"[${list.mkString(", ")}]")

      instead :) Thanks for the hint

  • u_suke_goto + 2 comments

    seems broken on elixir as well

    • mobileka + 0 comments

      Confirmed.

      It passes when I run the code, but fails all the tests when I submit it.

    • AllisonP + 4 comments

      I'm able to pass in Elixir. Do you want to try it again and see if you're still having an issue? Make sure you're printing a space/comma/semicolon-separated list.

      • mobileka + 1 comment

        Looks like test cases #1 and #2 are still broken. These cases expect an integer number as an output but it has to be a list instead.

        • HuShifang + 1 comment

          Confirmed this -- my code passes all the test cases but #1 and #2, and when I "purchase" test case #2, it indicates that the input and output should both be the integer X -- not a list of length X.

      • idabmat + 0 comments

        Sorry something still seems weird. Testcase 1 passes when "running" the code, but then it fails when "submitting" it.

      • ricoh + 1 comment

        Still broken!! Seems like the internal mechanism is counting the number of items in the list, which it uses to assert the test results. So output should be a list so it counts the number of elements. Purchased all test cases and for some wierd reason, even though testcase #1 and #2 fail, seems like #3 and #4 pass, and the output is an integer (total number of elements in the list) just like in the first 2.

        • ricoh + 0 comments

          ...was using IO.inspect without options, thats why it was failing, since inspect does not show the whole list if its too long, passing limit: :infinity to the inspect function's options fixed it. Nice!

  • balintant + 2 comments

    Haskell

    fn n = [1..n]

    • stefani_nesheva + 0 comments

      I was getting Wrong answer writing it like this. Rather fn n = [1..n-1] was accepted as solution

    • Buckmeister + 0 comments

      Since the content of the array was not specified, I returned a list of all prime numbers :-)

      primes :: [Integer] primes = let s l = head l : s [n | n <- tail l, n mod head l /= 0] in s [2..]

      fn n = take n primes

  • dillonredding + 5 comments

    I'm getting the following compile message in Scala, regardless of how I write it:

    warning: there was one deprecation warning; re-run with -deprecation for details
one warning found

    • hpedrorodrigues + 0 comments

      I had the same message.

    • saberwang + 0 comments

      Me, too. I think it's a bug in python scripts that run on Server . Foget my Bad English

    • saberwang + 0 comments

      def f(num:Int) : List[Int] = if(num==0) List() else num::f(num-1)

      I'm sure that's right

  • petertheking + 3 comments

    Is the checker broken for clojure? Input is 10, expected output is 10?

    • davcamer + 0 comments

      I believe expected output is a list of ten elements. This is unclear in the problem statement, but a list of ten elements satisfies the checker for Scala.

    • Nondv + 1 comment

      It's not broken. More than that, there's a one-word solution on Clojure ;D

      • petertheking + 0 comments

        Thanks all. I solved it the first time using one of the one-word solutions in Clojure the first time around, although I think it defeats the spirit of some of these questions.

    • AllisonP + 1 comment

      Try it again, I've made some corrections to the checker.

      • dsncode + 0 comments

        it does stil enforce me to print List as object. ex: List(1,2,3,4..) and there is no way to print like is required [1,2,3,4,5...]

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