Refactoring is the process of re-writing code with the intent of improving its quality without changing its external behavior. It is a constant effort that an engineering team has to make to keep or improve code quality. This post summarizes a lot of what I learned by refactoring both huge and tiny pieces of the iFood app.
Published at: 05 May 2021
Enumerations is one of Swift's coolest features for its versatility in representing a group of related values. They can become even more versatile and expressive combined with protocols such as Equatable. This short article shows some tricks to do so.
Published at: 23 February 2021
Even after some years of experience in Swift, I still find ranges a little bit tricky and have to take a look in the docs or make a playground to test things out, before using them at work. This post is a cheat sheet with examples on how to use ranges.
Published at: 03 February 2021
Swift's type-safety is one of the language's main features, and it is extremely powerful to harness the compiler type-check to your code. In this short article, I'll give some tips to improve readability and clearness of intent using some typing resources available.
Published at: 13 December 2020
Naming is one of the most underrated and overlooked skills that a good programmer should have, yet is a skill that we use every day by giving names to variables, functions, services, and so on. Good names make messy code easier to understand, and makes good code a delight to read. In this post, I'll share some insights on how to detect bad naming, and how to improve it.
Published at: 14 November 2020
Writing unit tests is one of the key responsibilities of a developer. Although writing a test is not that hard, setting up a controlled environment where you can unit test one component might be challenging, especially if your component is surrounded by legacy code. Setting up testing doubles is a winner technique to tackle this problem.
Published at: 01 October 2020
We want our software to be error-proof, but in reality, error scenarios will always exist.
So this article's objective is to explain why you should handle errors on your app, give you a rule of thumb on when treating errors, and give some practical improvements you could apply on your app.
Published at: 04 August 2020
When you are starting out on testing your code, you might find asynchronous methods a little bit tricky to test.
But do not worry, XCTestExpectation got you covered if you want to assert that an async block will execute, or even assert that it will not execute.
Published at: 07 July 2020
I'm on a quest to study data structures in Swift, and one really cool feature that Swift arrays implement is copy-on-write!
Published at: 24 May 2020
Recently, I discovered Publish, a static website generator that uses Swift, written by John Sundell.
The main idea is to declare all the pieces of your website like a Swift Package, and then using Plot to generate HTML code using the type-safety of Swift, and finally using Ink to render posts written in Markdown. (like this one!)
It may sound like a lot of tools to handle, but in reality, Publish already does most of the work for you.
Published at: 20 April 2020
Lucas Oliveira is a Software Engineer at iFood who enjoys sharing knowledge, iOS development, trying new frameworks and libraries, and recently is really excited about using Swift outside Apple platforms as well