leetcode/docs/solutions/49-group-anagrams.mdx

---
title: '49. Group Anagrams'
description: Given an array of strings strs, group the anagrams together. You can return the answer in any order
sidebar:
  badge: 'Medium'
---

<Badge variant="accent">Hash Table</Badge>

### Example 1:
- Input: `strs = ["eat","tea","tan","ate","nat","bat"]`
- Output: `[["bat"],["nat","tan"],["ate","eat","tea"]]`
- Explanation: There is no string in `strs` that can be rearranged to form `"bat"`. The strings `"nat"` and `"tan"` are anagrams as they can be rearranged to form each other. The strings `"ate"`, `"eat"`, and `"tea"` are anagrams as they can be rearranged to form each other.

### Example 2:
- Input: `strs = [""]`
- Output: `[[""]]`

### Example 3:
- Input: `strs = ["a"]`
- Output: `[["a"]]`

### Constraints:

- `1 <= strs.length <= 10^4`
- `0 <= strs[i].length <= 100`
- `strs[i]` consists of lowercase English letters.

## Solution

```js
/**
 * @param {string[]} strs
 * @return {string[][]}
 */
var groupAnagrams = function(strs) {
  let sorted = strs.map(str => str.split("").sort().join(""));
  let anagrams = {};

  for (let i = 0; i < strs.length; i++){
    if(!anagrams[sorted[i]]){
      anagrams[sorted[i]] = [strs[i]]
    }else{
      anagrams[sorted[i]].push(strs[i])
    }
  }

  return Object.values(anagrams);
};
```