this guide may help:

https://docs.codewars.com/training/troubleshooting

fixed

done

node 18+ enabled

duplicate of this issue

thanks for the explanation. in hindsight it was foolish of me, of course the hash code should change if data is mutated. i changed GetHashCode() to simply return Data.GetHashCode();.

C# warning in the preloaded section:

src/Preloaded.cs(5,22): warning CS0659: 'Node' overrides Object.Equals(object o) but does not override Object.GetHashCode()

(OP was solving in JavaScript)

your implementation of count() has a bug, it skips the last element of the list because your while(head.next) is not entered for the penultimate element. not a kata issue.

I added the following GetHashCode() implementation in preloaded, which cleared the warning. I don't know whether it is idiomatic enough though, I read that the hash code should stay constant for the lifetime of the object, which is not guaranteed here if we use the Node fields for the hashcode computation, as they are mutable. I tried to work around that.

private int? _hashCode = null;
public override int GetHashCode()
{
// should remain constant for the lifetime of the object
  if (_hashCode == null)
      _hashCode = Data.GetHashCode();
  return _hashCode.Value;
}

are you sure ? I can see sample tests just fine in Ruby. perhaps save your code somewhere and hit RESET ? you may have deleted them by mistake, or there was a glitch due to a recent fork (i see one Ruby fork approved 8 days ago that upgraded to Ruby 3.0)

do not erase the instructions in the initial code without reading them, and do not raise issues so lightly. you have to report the length of your output array through length_out

in the future, please do not use the issue tag to ask for help and use markdown to post your code
(see there).

Debug your code. I added this line to your code, and this is what I see for n = 56789:

std::cout << temp << " --> ";

56789 --> 95678 --> 89567 --> 78956 --> 67895 --> 56789

whereas the proper rotations of 56789 as shown in the description are:

56789 -> 67895 -> 68957 -> 68579 -> 68597

there are no sample tests in Java, as reported there. unless there was some kind of glitch, you must have added those sample tests yourself. without more details we cannot know what happened, so I am closing this; feel free to provide more information

that's not an issue, she does already know it ;-)

replaced the HTML table with Markdown