set intersection with & - Advent of Code 2022 - Day 3 with Ruby

In today's exercise, you'll see how to use the & operator to find the intersection of two sets to solve day 3 of the advent of code 2022.

Challenge: https://adventofcode.com/2022/day/3
Solution: https://gist.github.com/cjavdev/864bec6b1b6bc423be487d234009f9bf

#ruby #adventofcode