HackerRank Problem 🦆 In this challenge, we use regular expressions (RegEx) to remove instances of words that are repeated more than once, but retain the first occurrence of any case-insensitive ...

- Use stack instead of stringBuffer: keep append/remove last added item - However, stringBuffer appears to be faster than stack. Given a string which contains only lowercase letters, remove duplicate ...

Remove Java List duplicates through code The first two examples to solve this deduping problem use specialized Java components and APIs. However, it’s a fun exercise to just use the standard loop ...