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Building a Todo List Application in Pure Ruby: A Comprehensive Guide

Gokul
4 min readNov 22, 2024

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Today, I want to share something a bit different — we’re going to build a to-do list application without Rails.

I know, I know… Rails is fantastic (and I use it daily), but there’s something beautiful about pure Ruby that we often forget. So grab your favorite beverage, and let’s build something cool together!

When learning Ruby, it’s tempting to jump straight into Rails. However, understanding how to build applications with pure Ruby is crucial for mastering the language.

Why Are We Doing This?

Before you ask, “Why not just use Rails?” — let me tell you a quick story. Last week, I needed a simple CLI tool for task management. Rails would’ve been overkill, and honestly, building it in pure Ruby taught my junior devs more about Ruby’s core concepts than a month of Rails development.

Here’s what we’ll build:

  • A clean, simple todo list app
  • Command-line interface (because we’re cool like that 😎)
  • File-based storage (keeping it simple)
  • Some neat OOP patterns (because we’re professionals)

What We’ll Build

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Gokul
Gokul

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