Articles by Julio Sampaio
Julio is responsible for all aspects of software development such as backend, frontend, and user relationship at his current company. He graduated in Analysis and System Development and is currently enrolled in a postgraduate software engineering course.
Migrating From Turbolinks To Turbo
Turbolinks is no longer being developed. It's been superceeded by Turbo, which is part of Hotwire. In this article, Julio Sampaio shows us how to port our existing Turbolinks apps to Turbo.
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By Julio Sampaio
- Jan 10, 2022
Currency Calculations in JavaScript
When you do calculations with money, every penny needs to be accounted for. Unfortunately, JS's Number type isn't up to the task. In this article, Julio Sampaio shows us why and teaches us how to do currency calculations the right way in JavaScript.
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By Julio Sampaio
- Sep 13, 2021
Understanding RBS, Ruby's new Type Annotation System
Ruby's flexibility has always been both its greatest strength and its greatest weakness. You can write amazingly expressive programs. You can also slip and break them in amazingly expressive ways. RBS is a new type annotation system in Ruby 3 that seeks to keep ruby's flexibility while protecting us from some of its dangers. In this article, Julio Sampaio walks us through RBS. He explains the impact it has on metaprogramming, and he shows us how we can use it to make our own apps more robust.
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By Julio Sampaio
- May 31, 2021
React on Rails: Building a Simple App
To decide on a front-end for your Rails app, you need a feel for the options. Does a certain JS framework speak to you or does it make you feel dirty inside? There's only one way to find out! In this article, Julio Sampaio walks us through creating a React app from scratch and integrating it with a Rails back-end via webpacker.
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By Julio Sampaio
- May 10, 2021
Using Angular with Rails 5
Before you can decide on a front-end for your Rails app, you need a feel for the options. Does a particular JS framework speak to you or does it make you feel dirty inside? There's only one way to find out! In this article, Julio Sampaio walks us through creating an Angular app from scratch and integrating it with a Rails back-end via webpacker.
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By Julio Sampaio
- Apr 12, 2021
Currency Calculations in Ruby
You're doing some currency calculations in your app. It seems to be working well. But after a while, strange discrepancies emerge. The books stop balancing. People get mad. All because the code treated currency like any other number. In this article, Julio Sampaio shows us which of Ruby's number classes are unsuitable for currency, and walks us through better options.
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By Julio Sampaio
- Sep 30, 2020
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