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DIY: Accounts Merge

Explore how to merge multiple user accounts by identifying common emails, consolidating data efficiently in Ruby. Understand the problem of matching accounts beyond just names and implement a function to return merged, sorted email lists. This lesson helps you practice tackling real coding questions focusing on data structures and string manipulation.

Problem statement

In this challenge, you are given a 2D array called accounts. Each element in accounts[i] is an array of strings in which accounts[i][0] is a name and the remaining elements are email, representing the emails associated with that account.

Your task is to merge these accounts such that two accounts belonging to the same person ...