---
title: "Discussion on \"Advent of Code 2020: Day 4 (Ruby solution)\" | Hashnode"
description: "Discussion on \"Advent of Code 2020: Day 4 (Ruby solution)\". Another day,  another problem to solve. This time, you are asked for some data validation. You are supposed to parse entries from a text file.\nIn the first task, only validating the presence of some keys is required.\nIn the second one, you have to ch..."
url: "https://hashnode.com/posts/advent-of-code-2020-day-4-ruby-solution/5fca280148861774329a1e47"
---

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# [Advent of Code 2020: Day 4 (Ruby solution)](https://rubywizards.com/advent-of-code-2020-day-4-ruby-solution?utm_source=hashnode&utm_medium=feed)

Another day, another problem to solve. This time, you are asked for some data validation. You are supposed to parse entries from a text file. In the first task, only validating the presence of some keys is required. In the second one, you have to ch...

Dec 4, 2020 · 2 min read · rubywizards.com  
Updated Apr 13, 2021  
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## Written by

[Piotr Jurewicz](https://hashnode.com/@pjurewicz)

@pjurewicz · Łódź, Poland

  
[View profile](https://hashnode.com/@pjurewicz)

ruby on rails developer

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