Jezen Thomas

CTO & Co-Founder at Supercede.

All Posts

When Test Coverage Isn't Enough May 23^rd, 2025
Don't Skip HTML Validation May 20^th, 2025
Test Spies in Haskell April 18^th, 2025
A 10x Speedup in GHCi March 7^th, 2025
HTTP Verbs in Yesod Forms February 22^nd, 2025
My Technological Regrets January 30^th, 2025
Supercede's House Style for Haskell January 20^th, 2025
2024 in Retrospect January 7^th, 2025
I Feel Unsafe November 15^th, 2024
Is it c? Or is it с? July 16^th, 2024
Stubbing I/O in Yesod November 5^th, 2023
Haskell Pattern: Design for Qualified Imports August 17^th, 2023
Yesod Forms, Newtypes, and Smart Constructors June 14^th, 2023
Derived Instances Can Break Smart Constructors June 9^th, 2023
Please Don't Kill Me, Google Maps April 23^rd, 2023
Make Your Types Smaller December 31^st, 2022
Make Your Database Tables Smaller December 28^th, 2022
At Least Assert Your Serialisation Roundtrips December 10^th, 2022
We Deserve Better Than BEM August 24^th, 2022
Solving a Maths Riddle with Bad Haskell May 3^rd, 2022
Fast Counting with PostgreSQL and Haskell December 24^th, 2021
Why We Don't Do Daily Stand-Ups at Supercede August 30^th, 2021
20% Time at Supercede June 23^rd, 2021
How I Write Elm Applications November 7^th, 2020
Why I Love Monday Mornings May 22^nd, 2020
How I Work From Anywhere in the World February 2^nd, 2020
Rewriting Routes in Yesod January 22^nd, 2020
Implementing a Content Security Policy in Yesod September 21^st, 2019
Rich Hickey Doesn't Know Types April 9^th, 2019
You Think CSS-in-JS is Bad? January 30^th, 2019
Yesod is a Minimal Web Framework December 13^th, 2018
Showing The Weather In Tmux September 23^rd, 2016
Git Is Your Single Point Of Truth August 19^th, 2016
Working In The Dark March 6^th, 2016
The Case Against Dynamic Typing January 26^th, 2016
Visualising Code Growth with Git and D3.js October 25^th, 2015
Using Git to Manage Todos October 19^th, 2015
How I Write Invoices in Vim September 5^th, 2015
Automatic Quality Assurance with Git Hooks June 22^nd, 2015
Moving to the Beginning of the Line May 26^th, 2015
Shell Script Static Analysis in Vim May 17^th, 2015
Free Internet on Trains May 7^th, 2015
Working with Whitespace December 21^st, 2014
Folding Paragraphs in Vim October 29^th, 2014
Spirograph December 9^th, 2013
Arcify August 8^th, 2013
The Setup July 2^nd, 2013

© 2025 Jezen Thomas