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Category: Posts

What a Flerken are React PropTypes and How to Use Them in a Fancy Way?

What a Flerken are React PropTypes and How to Use Them in a Fancy Way?

Adriano Costaby Adriano CostaJune 27, 2019May 29, 2023

One of the main concepts of a React Component is its props. The props are used to pass data to a component, just like a …

The Dark Side of Flutter: What Frustrations Should You Expect?

The Dark Side of Flutter: What Frustrations Should You Expect?

Helio S. Juniorby Helio S. JuniorJune 11, 2019October 17, 2023

Recently, I had the opportunity to lead a mobile app development project where we decided to use the Flutter framework. In this post, I want …

Scalable Frontend #3 — The State Layer Patterns for the single source of truth

Scalable Frontend #3 — The State Layer

Patterns for the single source of truth

Talysson Oliveiraby Talysson OliveiraMay 21, 2019April 11, 2024

State tree, the single source of truth This post is part of the Scalable Frontend series, you can see the other parts here: “#1 — …

My Journey Discovering Design Patterns I Didn’t Even Know I Use Getting started with the decorator and service patterns

My Journey Discovering Design Patterns I Didn’t Even Know I Use

Getting started with the decorator and service patterns

Matheus D. Limaby Matheus D. LimaApril 11, 2019May 29, 2023

When I started my internship at CodeMiner 42 last October, I felt overwhelmed by information. So much new stuff to learn, and so much old …

Using Mappers to Organize Your Data Improve the organization of your components

Using Mappers to Organize Your Data

Improve the organization of your components

Abner Alvesby Abner AlvesMarch 21, 2019May 29, 2023

At some point during the development of your project, you might have needed to develop a feature that consumed data from an external source. You …

“!” and “?”: Understanding One of Ruby’s Coolest Naming Conventions

“!” and “?”: Understanding One of Ruby’s Coolest Naming Conventions

Luan Gonçalvesby Luan GonçalvesJanuary 29, 2019January 8, 2026

“Well, that’s quite some symbols you got there ♨_♨” – You, after reading this article’s title. It was a calm Friday afternoon here at CodeMiner42, …

Build Your First App with Flutter: Fetching Data from an API

Build Your First App with Flutter: Fetching Data from an API

Helio S. Juniorby Helio S. JuniorDecember 19, 2018May 29, 2023

Since the release of Flutter Beta, its community has been growing steadily! The goal of this article is to show how you can use Flutter …

Destroying an Association Marked as Read-Only in Rails

Destroying an Association Marked as Read-Only in Rails

Adriano Costaby Adriano CostaDecember 17, 2018October 17, 2023

Read-only is a boolean setting. When true, it prevents an Active Record instance to be updated or destroyed. Although very helpful, there are a few …

Scalable Frontend #2 — Common Patterns Applying layered architecture in a practical way

Scalable Frontend #2 — Common Patterns

Applying layered architecture in a practical way

Talysson Oliveiraby Talysson OliveiraNovember 22, 2018April 11, 2024

Patterns should fit nicely, like playing blocks This post is part of the Scalable Frontend series, you can see the other parts here: “#1 — …

Migrating from Paperclip to ActiveStorage My first challenge as an intern

Migrating from Paperclip to ActiveStorage

My first challenge as an intern

Leonardo Negreirosby Leonardo NegreirosNovember 7, 2018May 29, 2023

First of all, I’m no expert in programming. In fact, I started with Ruby on Rails about one and a half month ago with the …

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