December 12th 2018 7 kyu https://www.codewars.com/kata/regex-validate-pin-code/train/javascript 6 kyu https://www.codewars.com/kata/delete-occurrences-of-an-element-if-it-occurs-more-than-n-times/train/javascript 5 kyu https://www.codewars.com/kata/vector-class/train/javascript https://www.codewars.com/kata/tic-tac-toe-checker/train/javascript