Group Anagrams Problem (LeetCode Problem-Solving — 4)

The task is to group words that are anagrams of each other from a given array of strings. Words are considered anagrams if they have the same characters with the same frequency but arranged differently.

My articles are open for everyone; non-member readers can read the article by clicking this Friend link.

Anagrams Definition: a word, phrase, or name formed by rearranging the letters of another, such as “cinema”, formed from “iceman”.

Given Constraints:

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

1 — Approach: Hash Map for Grouping

We use a hash map (object) to group words based on a unique identifier for each anagram. A sorted version of a string is an effective identifier since all anagrams will have the same sorted form.

2— Solution Implementation

Example:

Input: strs = [“eat”,”tea”,”tan”,”ate”,”nat”,”bat”]