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Codeminer42’s Engineering Blog

Category: Beginner

Integers overflow and underflow

douglas.marquesby douglas.marquesJune 8, 2022June 8, 20220

As we all should know already, memory is not an infinite resource despite looking like it. Given our current scenario where hardware is relatively cheap, …

Using Docker to instantiate local databases

A minimalist guide on the Docker way of setting up local databases

Pedro Henriqueby Pedro HenriqueApril 13, 20220

From tutorials to enterprise-level software, knowing how to set up a local database instance is a mandatory skill. You’ve probably had to go through tons …

CodeTips#2: How Specificity works in CSS

Matheus Hahnby Matheus HahnMarch 30, 2022March 30, 20220

When working on web apps, at some point, you will need to overwrite styles from components to which you have no access to the CSS …

Clean code in JavaScript

Rafael Pierriby Rafael PierriMarch 23, 2022March 23, 20220

* Image from unsplash INTRODUCTION INTRODUCTION I believe the comic strip above sums it well: You write clean code mainly to understand yourself in the …

A beginner’s personal journey into automated tests

Felipe Teixeiraby Felipe TeixeiraMarch 16, 20220

Like many engineers, I landed into coding kind of by accident. I was programming alone and unsupervised for a decade and my work was mostly …

CodeTips#1: Exploring Hashes in Ruby

Luan Gonçalvesby Luan GonçalvesFebruary 23, 20220

Hello, fellow readers! Before we can jump right in, we have an announcement! There is a new series of posts here in the blog: CodeTips! …

Elixir/Erlang: Tail Call Optimization is not enough

Feelings after researching and experimenting on Tail Call Optimization

Edigleysson Silvaby Edigleysson SilvaJanuary 19, 2022January 19, 20220

In this article, we’ll be talking about a widespread concept of Functional Programming called Tail Call Recursion (or Tail Call Optimization or just Tail Call). …

Ruby’s Cool Features for Beginners

Paulo Eduardoby Paulo EduardoOctober 13, 2021October 13, 20210

Hi, everyone! In this article, we’re gonna cover some features and concepts that differ Ruby from other programming languages, especially from languages that I’ve learned …

AWS SNS – What You Should Know About it + a NodeJS Implementation

Lucas Assisby Lucas AssisSeptember 1, 2021August 30, 20210

Image by unsplash Hi there! In the past few weeks I’ve been working on the backend of a mobile chat application, or, what I like …

AWS Cognito – An Implementation Guide for your NodeJS Application

douglas.marquesby douglas.marquesAugust 2, 2021August 2, 20210

In this article, we aim to give you an overview of what AWS Cognito solves and how to use it as your app’s authentication provider, …

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