Length of Last Word

Write a function `groupAnagrams` that takes an array of strings and groups the anagrams together. ## Function Signature ```function groupAnagrams(strs);``` ### Example 1: > **Input:** `strs = ["eat", "tea", "tan", "ate", "nat", "bat"]` \ > **Output:** `[["eat", "tea", "ate"], ["tan", "nat"], ["bat"]]` \ > **Explanation:** All strings that are anagrams are grouped together. ### Example 2: > **Input:** `strs = [""]` \ > **Output:** `[[""]]` \ > **Explanation:** An empty string is considered an anagram of itself. ### Example 3: > **Input:** `strs = ["a"]` \ > **Output:** `[["a"]]` \ > **Explanation:** A single character string is considered an anagram of itself.

Compress a string using the counts of repeated characters. ## Function Signature ```function compressString(chars);``` ### Example 1: > **Input:** `chars = ["a","a","b","b","c","c","c"]` \ > **Output:** `["a","2","b","2","c","3"]` \ > **Explanation:** The string compression of "aabbbccc" is "a2b2c3". ### Example 2: > **Input:** `chars = ["a","b","c"]` \ > **Output:** `["a","b","c"]` \ > **Explanation:** The string compression of "abc" is "abc" as each character appears only once.

Determine if two strings are anagrams of each other. ## Function Signature ```function isAnagram(s, t);``` ### Example 1: > **Input:** `s = "anagram", t = "nagaram"` \ > **Output:** `true` \ > **Explanation:** The strings "anagram" and "nagaram" are anagrams of each other. ### Example 2: > **Input:** `s = "rat", t = "car"` \ > **Output:** `false` \ > **Explanation:** The strings "rat" and "car" are not anagrams.