Paweł Świątkowski articles - 37 total
Chekhov's gun principle for testing
It’s not an uncommon notion that writing tests is more of a storytelling task than a technical one....
Enhancing Your Elixir Codebase with Gleam
Do you write Elixir but sometimes miss the benefits of type safety we have in other languages? If the...
Checking Efx - testable effects for Elixir
Mocking in Elixir is always a hot topic, mainly because of people coming from different other...
Don't refactor the code
This is a piece of advice someone gave me a long time ago. Unfortunately, I don't really remember...
Creating Custom Exceptions in Elixir
Exceptions and exception handling are widely accepted concepts in most modern programming languages....
Reconfiguring your application live with dRuby
dRuby is a pretty old but relatively unknown part of Ruby standard distribution. I first wrote about...
Functional domain modeling in Elixir
In this blog post I want to explore how using techniques from functional modeling can improve the...
On using Phlex
Seb Wilgosz recently published an article Phlex with Hanami on Hanami Mastery. It made the latest...
Data migrations in regular migrations and why you (probably) should not do that
Every once in a while I read Lucian Ghinda's Short Ruby newsletter and I see a "take" there which...
Writing a Custom Credo Check in Elixir
Static code analysis is an important tool to ensure a project meets the right code standards and...
Rendering tasks (Writing TUI with Ratatouille)
Previously on Writing TUI with Ratatouille: we learned how to add Ratatouille to the project, what...
Writing TUI with Ratatouille
(the title should rhyme, if it does not perhaps you're not reading it correctly... or I'm really bad...
Underrated pattern of an inline event dispatcher
In the Events, event, events article I outlined three possible meanings of using the word "event" in...
Events, events, events
When talking about software architecture in a web development context most of the time it will come...
Create a Business Language for a Rails Application
As web developers, we tend to approach problems with traditional low-risk solutions. When all you...
Long story short: I build a Ruby extension with Zig
I always had mixed feelings about writing native Ruby extensions. They surely are the way to make...
A First Look at Hanami 2 for Ruby
As of 06/12/2022, Hanami 2.0.1 has been released. Read more about the enhancements, bug fixes and...
Write migrations last
When starting to work on a new feature, let's say: adding comments to a restaurant listing app, our...
Purity injection in Elixir
If you came to Elixir from Ruby, like I did, you have probably been looking for a way to do...
ActiveRecord, over-optimization and POLS
I recently learned that ActiveRecord implements an "interesting" optimization. When you pass a...
Renaming a table in production in PostgreSQL
Sometimes you don't get it right in the first attempt. When some time ago I announced that we need...
Yard Sale - event-driven e-commerce
Overview of My Submission Yard Sale was an idea of old to enable people to list things...
Steering your submarine with Elixir, Leex and Yecc (AoC'21, day 2)
After solving a Advent of Code challenge by treating the input as a program last year, I wanted more...
Application with Elixir, business logic with Gleam
One of the young programming languages I look at from afar and root for is Gleam. It is a statically...
Six months of Elixir - some thoughts after switching the main language
lmost exactly six months ago I started to work for Fresha, where Elixir is a main language for...
Treat your flaky tests like production bugs
Flaky tests are a bane of every larger test suite out there. At first they show up very rarely. Once...
Solving AoC#2 puzzle with Parslet
It's December again and this means that another edition of Advent of Code is under way. Most of us ha...
Seeds-driven development
In my career as a web developer, I created my fair share of what I call content-driven websites. Unli...
Understanding complex Ruby application with profiling tools
This was originally posted on my blog. For a long time profiling Ruby apps sounded like a low-lev...
Advent of Code, day 4 in Zig
For day 4 of Advent of Code I wrote my solution in Zig. In this blog post I want to share a couple of...