For that use split () method from String Class, this will return array of strings. 📌 After getting the list of words, we going to store them in a map as <words, occurrence count>. 📌 The map.entrySet ...

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 ...