Unpublishing as a duplicate of https://www.codewars.com/kata/57cc975ed542d3148f00015b, with many unresolved issues.

This kata appears to be a duplicate. The java tests seem to be incorrect.

Duplicate issue anyway. Closing.

Duplicate issue anyway. Closing.

Duplicate issue. Closing.

Raise a better issue.

This is unhelpfully vague. Say what you want improved, and how.

That would be a suggestion, not an issue.

maybe you can change the function parameters names

Duplicate.

These test cases are garbage:

string = bye
array = [bye,hello]

expects false. That is clearly true.

Make a better description

Haskell : https://www.codewars.com/kumite/5b635f0467557ed50600012e?sel=5b635f0467557ed50600012e

I think that you can change you problem to case insensitive. I have seen lots of kata like this. Please try to make it more distinct.

Ruby

Since this is a beginner level, some sample tests would be more than helpful.