Group anagrams

class Solution:
    def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
        res = collections.defaultdict(list)
        for i in range(len(strs)):
            res[tuple(sorted(strs[i]))].append(strs[i])

        return res.values()

Group Anagrams

Difficulty: Medium

Given an array of strings strs, group the anagrams together. You can return the answer in any order.

An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.

 

Example 1:

Input: strs = ["eat","tea","tan","ate","nat","bat"]
Output: [["bat"],["nat","tan"],["ate","eat","tea"]]

Example 2:

Input: strs = [""]
Output: [[""]]

Example 3:

Input: strs = ["a"]
Output: [["a"]]

 

Constraints:

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