Group Anagrams

Problem

Given an array of strings, group the strings that are anagrams of each other and return all groups. Example: ["eat","tea","tan","ate","nat","bat"] → [["eat","tea","ate"],["tan","nat"],["bat"]] — order of groups and within each group doesn't matter.

Constraints

• ›1 ≤ strs.length ≤ 10⁴
• ›0 ≤ strs[i].length ≤ 100
• ›strs[i] consists of lowercase English letters